Because giving birth was such a high-risk enterprise, and because so many of the products of that enterprise died before payback of the [pun intended, I think] labor involved in bringing them to the world, it was THE most important work of society. Those members able to do it had to be kept in such a situation that it allowed them to maximize that one thing they could do.
As for “the property of their husbands, etc, etc, blah blah blah” work was so brutal and hard, and providing for a family so difficult, that yes, a man wanted to make sure the children he supported were his own.
Also, because of very early (many women married before even 18) death in childbirth, etc, most women skewed younger than men as a population, which would encourage a certain degree of paternalism. On top of that, hate to tell you, but women while hormonal are often not fully rational. We can sort of compensate for it, but one of the pregnancy hormones is SUPPOSED to make you fat, dumb and happy.
I don’t know if most women need a minder while pregnant, but from both personal experience and watching friends go through it, I imagine many women do.
It is therefore only natural that in a society where most women are pregnant most of the time, men would view it was their duty to look after the puir confused things.
When feminists assume that back in a time with no contraceptive, high child mortality and an horrendous death toll of pregnancy, women should have been recognized as the equals of men, and that men were being evil villains for not doing that, they are demonstrating an astonishingly blind and ideological view of history.
In fact, even back in the middle ages and before SOME women were considered the intellectual equals of men. (And sometimes the military equals.) There are very few of them, again, not because The Man was keeping them down, but because the women attracted to intellectual or military pursuits are (like men) a minority and on top of that they tended to be either unmarried, childless, or the percentage of women not much affected by pregnancy. I.e. a minority of minorities.
Women started making advances in what was considered, traditionally, male realms, like science or scholarship, (the others … well … there is a problem with upper body strength. Sure. Some women. Again a minority of a minority) or being able to vote when two twin advances occurred: the first was the curbing of infant mortality. When it became obvious (after a generation or so) that most of your babies would survive, it was possible for women to spend only a tiny minority of their lives pregnant.
The second was contraception that was cheap, easily available, and safe. Yeah, okay, I have certain issues with the pill, because the medical issues of using it long term are only now showing up in the population at large. That’s fine.
It remains that even the early “horse-dose” pill was safer than anything else anyone else had ever come up with for women to avoid getting pregnant all the time.
Sarah Hoyt, “Wrong Battle, Insane Tactics”, According to Hoyt, 2018-01-15.
April 7, 2020
QotD: The universal plight of women in pre-modern times
April 4, 2020
Eighteenth century health improvements through “ventilators”
In the latest Age of Invention newsletter, Anton Howes relates how a mistaken belief still led to a significant improvement in health:
One of the most worrying diseases of the mid-eighteenth century was typhus. We now know that it is spread by lice or fleas, but at the time, like so many other diseases, it was thought to be caused by noxious air — “malaria”, for example, literally means “bad air”. This was not a silly theory. It was based on empirical observation, which perhaps explains why the belief in such noxious miasmas persisted for so long — well into the late nineteenth century, if not the early twentieth, before finally being ousted by germ theory. Our ancestors were not stupid, no matter how strange their beliefs might appear in hindsight. (Also take alchemy, or the belief that some animals spontaneously generated.)
The Central Tower of the Palace of Westminster is actually a disguised ventilator.
Photo by Cary Bass via Wikimedia Commons.Typhus fit the miasma theory especially well because it frequently appeared in confined spaces, like ships’ holds, prisons, mines, workhouses, and hospitals. The disease was thus often called “gaol fever”, or “hospital fever”. And there was the fact that at least one of the solutions designed to combat miasmas, the ventilator, actually seemed to work. This ventilator was not the kind that is in such high demand right now, used to help feed oxygen into patients’ lungs, but instead a machine used to get the air flowing in and out of confined spaces — like a 1740s air-conditioning unit.
At first glance, removing the stale air from a space shouldn’t do anything against typhus. But mortality declined drastically in the prisons and ships to which the ventilator was introduced. It halved the number of deaths per year in Newgate prison, where the bellows-like machinery was powered by a windmill, and the inmates of the Savoy prison fared even better. On ships, too, mortality declined among mariners, passengers, soldiers, and especially among the group that suffered most from long voyages across the eighteenth-century Atlantic: slaves.
But it’s not clear exactly why. After all, the ventilator did not kill the typhus-ridden lice or fleas. I have a few theories as to what must have been going on. Perhaps, by improving the supply of oxygen to confined spaces, people’s bodies were simply better served to deal with all manner of diseases. Surgeons aboard slave ships sometimes noted that, without proper ventilation, many slaves would simply die in the night of suffocation. Or perhaps the ventilator’s effectiveness had something to do with its drying effect. The machine was used to prevent grain stores from becoming humid, thus staving off damp-loving weevils. The ventilators might thus have staved off typhus through a similar means: although I’m not so certain about body lice, humid conditions are preferred by fleas. Regardless of the real reasons, the ventilators worked, and even when they did not reduce mortality, they made confined spaces more bearable for those who had to endure them. Ship captains reported that they did not even have to force their sailors to pump the ventilator’s bellows, because they liked the cool air so much. Ventilators were soon installed in the House of Commons, and in many of London’s theatres.
From the Wikipedia entry on architectural ventilation:
The development of forced ventilation was spurred by the common belief in the late 18th and early 19th century in the miasma theory of disease, where stagnant ‘airs’ were thought to spread illness. An early method of ventilation was the use of a ventilating fire near an air vent which would forcibly cause the air in the building to circulate. English engineer John Theophilus Desaguliers provided an early example of this, when he installed ventilating fires in the air tubes on the roof of the House of Commons. Starting with the Covent Garden Theatre, gas burning chandeliers on the ceiling were often specially designed to perform a ventilating role.
Mechanical systems
A more sophisticated system involving the use of mechanical equipment to circulate the air was developed in the mid 19th century. A basic system of bellows was put in place to ventilate Newgate Prison and outlying buildings, by the engineer Stephen Hales in the mid-1700s. The problem with these early devices was that they required constant human labour to operate. David Boswell Reid was called to testify before a Parliamentary committee on proposed architectural designs for the new House of Commons, after the old one burned down in a fire in 1834. In January 1840 Reid was appointed by the committee for the House of Lords dealing with the construction of the replacement for the Houses of Parliament. The post was in the capacity of ventilation engineer, in effect; and with its creation there began a long series of quarrels between Reid and Charles Barry, the architect.Reid advocated the installation of a very advanced ventilation system in the new House. His design had air being drawn into an underground chamber, where it would undergo either heating or cooling. It would then ascend into the chamber through thousands of small holes drilled into the floor, and would be extracted through the ceiling by a special ventilation fire within a great stack.
Reid’s reputation was made by his work in Westminster.
March 29, 2020
March 27, 2020
Sensible risk management is not compatible with the “precautionary principle”
David Zaruk wrote last week for Science 2.0 Europe:
Two decades of the precautionary principle as the key policy tool for managing uncertainties has neutered risk management capacities by offering, as the only approach, the systematic removal of any exposure to any hazard. As the risk-averse precautionary mindset cements itself, more and more of us have become passive docilians waiting to be nannied. We no longer trust and are no longer trusted with risk-benefit choices as we are channelled down over-engineered preventative paths. While it is important to reduce exposure to risks, our excessively-protective risk managers have, in their zeal, removed our capacity to manage risks ourselves. Precaution over information, safety over autonomy, dictation over accountability.
- Whatever happened to “Keep out of reach of children”? Now we cannot be trusted and all products must be child-safe.
- Whatever happened to “Handle with care”? Now safety by design has removed the need for individuals to exercise common sense or risk reduction measures.
- Whatever happened to trust? Now individuals are no longer left with the capacity to make their own decisions in managing personal risks.
“These are good things” precaution advocates would retort “since people often make mistakes and bad things can better be prevented!”. While continuous improvement of safety systems has its value, the bigger the fences, the less autonomously the individuals will react (creating a society of docile followers). The precautionary approach implies a lack of trust in individuals’ capacities to make their own (rational) choices. The over-engineered risk-management process would remove any situation where choices could be made. Fine for cases where there are no trade-offs, disruptions or loss of benefits (when the sheep have plenty of grass in their field), but in times of crisis (exposure to hazards), when precaution is your only tool, then sacrifice is the only solution.
[…]
When the public now sees everything of modern life (work, school, public events …) cancelled in a knee-jerk precautionary impulse, is it any wonder they are panicking? Enter the opportunist to sell you the silver solution or the naturopath detox remedy to put your mind at ease. Enter the quack to tell you to drink bleach. Enter the racist who will use the fear to mobilise outrage. Exit rationality and risk management.
With no bullets left in the risk-management gun, the only thing left to do is run … or as it is more commonly called: apply the precautionary principle. Precaution should only be applied after other risk management measures have failed but given how horribly inadequate our capacities to govern have become, it is the only strategy our regulators have come to know.

Slide from a presentation by Patti Gettinger, 2011-07-11.
Original slideshow at https://fr.slideshare.net/regsgridlock/the-precautionary-principle-8656034
H/T to Johnathan Pearce for the link.
March 23, 2020
March 18, 2020
What is really driving the Wuhan Coronavirus panic
… besides the wall-to-wall hysteria in the mainstream media, I mean. Severian discusses the insights of “perverted old cokehead” Sigmund Freud on anxiety and its effects, then segues to our current, shared, plight:

Photographic portrait of Sigmund Freud, signed by the sitter (“Prof. Sigmund Freud”) by Max Halberstadt (c. 1921)
Wikimedia Commons
Everyone who has thought about it for five minutes knows that something’s not right. […] As y’all have noted, actual hard information on the coronavirus is hard to come by. Is it fully air-transmissible? What are the infection rates? Hell, what are the death totals? And speaking of the death totals, even if you trust China’s figures (which no reasonable person can possibly do), they seem … low. Like, really low. I actually trust Italy’s government to deliver some vague approximation of the truth, and even there, where they’re in full-blown freakout mode, it seems to kill off old folks with compromised immune systems and lung problems at a fractionally higher rate than your garden-variety flu.
So, you know … it’s the flu. Not great by any means, and more infectious (possibly) than some other flus in our recent past, but for all that just the flu. The ongoing sky-is-falling global freakout has next to nothing to do with the actual bug. We live in a deeply anxious age, and that anxiety has to discharge somehow. It’s global hysteria — classic hysteria, Freudian hysteria, an excess of stress that must be discharged by “converting” it into behavior.
The people who are freaking out about it aren’t worried about dying from it. No, really, they’re not. Nor should they be — no reasonably healthy person under age 70 has any reason to be worried about that. Instead, what they’re worried about is powerlessness. We’ve all long suspected that we’re ruled by idiots and grifters. We’ve all long sensed that our “leaders” hold us in deep contempt. And we’ve long known that none of our problems are worth anything to the global pirate capitalist class. The only reason those bastards care if we all drop dead from the plague is that they can’t sell enough iCrap to each other to keep the company stock price up.
We know this. But we can’t say it, and we can’t act on it, because doing so goes against our self-image. Our media, our education system, our “culture” (such as it is) has spent the last half-century telling us what special and unique snowflakes we all are, even as it’s forcing us into ever-greater conformity. We’ve broken all the taboos, transgressed all the boundaries, liberated all the oppressed. If there ever were to be such a thing as “social justice,” then truly we’ve achieved it, here in this best of all possible worlds where you can lose your job for not addressing your co-worker as a wingless golden-skinned dragonkin and 6’2″ dudes with beards down to their collarbones can go wee-wee in the little girls’ room …
… and yet. And yet. And yet feminists (just to stick with a theme), despite running everything for the last 30 years, still can’t get that lousy 25 cent raise. Seven out of every five college girls are sexually assaulted the minute they step on campus, despite boys being as rare as sasquatches on most campuses (and despite the ever-growing clamor for free college for everyone). You’re free to — hell, you’re practically required to — make up your own pronouns, but you’re not allowed to ask just how a degree in “gender studies” could be worth even one dollar in student loan debt, let alone one hundred thousand dollars. We keep agitating for change, keep voting for it, keep tweeting about it … and nothing happens.
That profound sense of powerlessness is exactly, and I do mean exactly, what screwed up Anna O. She hated her father for not allowing her any personal agency. In her heart of hearts she wanted him dead. And yet she knew herself to be a loving daughter, so that overwhelming sense of relief — indeed, of joy — she felt when he kicked the bucket sent her around the bend.
A classic “dirty book” of the late Middle Ages
I’m not well read in the classics, being much more of a history reader myself, so I didn’t know anything about The Decameron. Arthur Chrenkoff provides a helpful thumbnail of the book:

“A Tale from the Decameron” by John William Waterhouse (1916).
Image from the Lady Lever Art Gallery via Wikimedia Commons.
Giovanni Boccaccio had written The Decameron in the aftermath of the Black Death pandemic of 1348, which carried away somewhere around one third of the European population. The book is set in a monastery, where seven young women and three young men, the Millennials of the day, self-quarantine themselves for ten days to avoid the plague and while away their days (there was no internet in those days, you see) telling each other stories, ten each day, all based around a chosen theme, such as love that ends happily or the tricks that women play on men. Many of the stories are a bit dirty, which is why The Decameron was put on the Catholic Church’s index of prohibited books; more interestingly, it was also banned in Australia until 1973, on pretty similar grounds.
March 16, 2020
Cognitive dissonance, family style
Severian has some fun discussing current events with a nephew:

Image from Castle of Chaos – https://castleofchaos.com/blog/5-tips-for-surviving-a-zombie-apocalypse/
Just recently I had some fun with one of my nephews, who’s unexpectedly home for “Spring Break.”
Let’s take this Wuhan Flu thing seriously, I said. But since that hits a little too close to home, let’s pretend it’s a zombie outbreak. I want you to take it 100% seriously. The zombie virus has made it to our shores. It’s not too bad yet, but there’s definitely a walking dead situation. So … what do you want the government to do?
Nephew of course starts rattling off all the Chuck Norris fantasies young college guys have. Close the ports, call out the army, firebomb the streets wherever infected are sighted, yadda yadda. All of this is translated from the teenager, but you get the gist of it:
Me: Ok. Now, since we’ve stipulated that we’re taking this 100% seriously: Do you really want to give the government the power to do all that?
Nephew: Of course!
Me: Ok. Well then, do you really want to give Donald Trump the power to do that?
Nephew: Oh my god no!!! Orange Man bad!!!
Me: Now wait a minute, Nephew. You just said you’re taking this 100% seriously. You just said you want the government to have the power to set up flamethrower checkpoints on all major roads. Well, who is the current head of the government?
Nephew: But … but … but … Orange Man BAD!!!!
Me: Remember, Nephew, you promised to take this 100% seriously. So are you seriously telling me that the first thing you’d do, in the event of the zombie outbreak, is call an emergency presidential election, in the hopes that someone — Joe Biden, Bernie Sanders, Tulsi Gabbard, somebody — would win, so that the right kind of person could take all those measures you said were so very, very, very immediately necessary?
Nephew: Uhhhh … no, I guess not.
Me: So you do want to give Donald Trump that power, since he is, in fact, the current head of the United States government?
Nephew: Oh my god no! Orange Man BAAAAAAADDDD!!!!
Me: Well then I guess you’re just not serious about this zombie outbreak, are you?
March 15, 2020
QotD: The latest breakthrough in psychological therapy
All therapy books start with a claim that their form of therapy will change everything. Previous forms of therapy have required years or even decades to produce ambiguous results. Our form of therapy can produce total transformation in five to ten sessions! Previous forms of therapy have only helped ameliorate the stress of symptoms. Our form of therapy destroys symptoms at the root!
All psychotherapy books bring up the Dodo Bird Verdict – the observation, confirmed in study after study, that all psychotherapies are about equally good, and the only things that matters are “nonspecific factors” like how much patients like their therapist. Some people might think this suggests our form of therapy will only be about as good as other forms. This, all therapy books agree, would be a foolish and perverse interpretation of these findings. The correct interpretation is that all previous forms of therapy must be equally wrong. The only reason they ever produce good results at all is because sometimes therapists accidentally stumble into using our form of therapy, without even knowing it. Since every form of therapy is about equally likely to stumble into using our form of therapy, every other form is equally good. But now that our form of therapy has been formalized and written up, there is no longer any need to stumble blindly! Everyone can just use our form of therapy all the time, for everything! Nobody has ever done a study of our form of therapy. But when they do, it’s going to be amazing! Nobody has even invented numbers high enough to express how big the effect size of our form of therapy is going to be!
Consider the case of Bob. Bob had some standard-issue psychological problem. He had been in and out of therapy for years, tried dozens of different medications, none of them had helped at all. Then he decided to try our form of therapy. In his first session, the therapist asked him “Have you ever considered that your problems might be because of [the kind of thing our form of therapy says all problems are because of]?” Bob started laughing and crying simultaneously, eventually breaking into a convulsive fit. After three minutes, he recovered and proceeded to tell a story of how [everything in his life was exactly in accordance with our form of therapy’s predictions] and he had always reacted by [doing exactly the kind of thing our form of therapy predicts that he would]. Now that all of this was out in consciousness, he no longer felt any desire to have psychological problems. In a followup session two weeks later, the therapist confirmed that he no longer had any psychological problems, and had become the CEO of a Fortune 500 company and a renowned pentathlete.
Not every case goes this smoothly. Consider the case of Sarah. Sarah also has some standard-issue psychological problem. She had also been in and out of therapy for years, tried dozens of different medications, none of them had helped at all. Then she decided to try our form of therapy. In her first session, the therapist asked her “Have you ever considered that your problems might be because of [the kind of thing our form of therapy says all problems are because of]?” Sarah said “No, I don’t think they are.” The therapist asked “Are you sure you’re not just repressing the fact that they totally definitely are, for sure?” As soon as Sarah heard this, she gasped, and her eyes seemed to light up with an inner fire. Then she proceeded to tell a story of how [everything in her life was exactly in accordance with our form of therapy’s predictions] and she had always reacted by [doing exactly the kind of thing our form of therapy predicts that she would], only she was repressing this because she was scared of how powerful she would be if she recovered. Now that all of this was out in consciousness, she no longer felt any desire to have psychological problems. In a followup session two weeks later, the therapist confirmed that she no longer had any psychological problems, and had become the hand-picked successor to the Dalai Lama and the mother of five healthy children.
Previous forms of therapy have failed because they were ungrounded. They were ridiculous mental castles built in the clouds by armchair speculators. But our form of therapy is based on hard science! For example, it probably acts on synapses or the hippocampus or something. Here are three neuroscience papers which vaguely remind us of our form of therapy. One day, neuroscience will catch up to us and realize that the principles of our form of therapy are the principles that govern the organization of the entire brain – if not all of multicellular life.
Scott Alexander, “Book Review: All Therapy Books”, Slate Star Codex, 2019-11-21.
March 11, 2020
QotD: Orthorexia
The American media and our popular culture both celebrate a fear of safe, nutritious food if it is not labeled “organic.” To be consistent then, why don’t we also celebrate anti-vaxxers’ fear of safe vaccines, which are also not “organic?” To be clear, I am not an anti-vaxxer. I am strongly pro-vaccine. Everyone in my house is vaccinated, and I am appalled at the outbreaks of contagious diseases due to anti-vaxxers. But let’s be clear, a Venn diagram of those who obsess about organic food and anti-vaxxers will reveal a major overlap. If you know an anti-vaxxer, he is most likely committed to an organic diet.
Our culture accepts as a scientific fact that organic food is healthier than non-organic food. You can watch TV, read popular magazines, or listen to healthy-living gurus, and overwhelmingly you will be told that organic food is healthier than non-organic food. Recipes tend to call for organic produce and ingredients. And it goes beyond organic foods. Genetically-modified foods are slandered as “frankenfoods” concocted by mad scientists in a laboratory. Further, we are admonished to avoid anything that is not “natural.”
OK then. Vaccines are genetically modified, lab-made, and certainly not natural. Being anti-vax seems a logical extension of the natural, organic lifestyle.
I know several people — including family members — who have so completely bought into the natural-organic hype that they genuinely believe GMO and non-organic foods are poisonous. They would rather starve themselves and their children to death than ingest a gram of non-organic food. They look at the shelves of a regular grocery store and see rows and rows of poison. There is a medical term for this fear of safe healthy food — it’s called “orthorexia.” I am not shocked that some of these individuals are anti-vaxxers. Instead, I am shocked (and relieved) that some of the orthorexics I know actually do vaccinate themselves and their children.
Buck Throckmorton, “Organic Food & Anti-Vaxxers – Does The Fear of Safe Food Lead to Fear of Safe Vaccines”, Ace of Spades H.Q., 2019-12-08.
March 9, 2020
One of the economic effects of the Coronavirus outbreak might actually be bottom-line positive
Tim Worstall explains:

“Trade Show Portfolio – Guy Lewis Photography” by Guy Lewis is licensed under CC BY-NC 4.0
One notable thing about tech events is that they tend to be in interesting places like Amsterdam and Barcelona, and you don’t get many self-employed attending. Because someone self-employed loses days of paid hours, has to pay for the flights and the tickets. And they can get the same stuff from YouTube or various learning sites like Lynda.com. Tech events are mostly a jolly for employees in bloated companies. You get 3 days out of the office, have some fun and the boss picks up the tab. Losing this will probably improve the bottom line. And “business conferences” are mostly the same.
For people working more from home, that’s a good thing. Reduced travel costs (time and petrol), less tiredness. This is gradually happening anyway, but Coronavirus has given it a boost.
And maybe everyone realises that a system of education inherited from the time before Gutenberg, when books were a scarce resource, is perhaps in need of reform. OK, you probably need to be at a university for cutting up cadavers in medicine, but for history or computer science you can probably do most of it from your parent’s spare room.
One thing about the way people work is that they often fall into habits. Change often comes from startups and small businesses because they don’t have habits. Sometimes, they’re even anti-habit. Someone in a large company sees something as wasteful and scraps it in the new company. Microsoft let their people wear what they wanted for work, rather than suits. And gradually, those new businesses replace the old. But there’s also sometimes crises that break habits. Someone is forced to do something and gets their eyes opened. They perhaps realise that the alternative works fine, or maybe better.
March 5, 2020
“Maybe … Trump’s victory caused an unusual number of spontaneous abortions in Ontario”
Colby Cosh on the recently published findings of a p-hacking conspiracy study on how the election of President Donald Trump was reflected in the birth ratio of liberals in Ontario:

Front view of Toronto General Hospital in 2005. The new wing, as shown in the photograph, was completed in 2002.
Photo via Wikimedia Commons.
On Monday there came a surprising piece of science news from BMJ Open, an open-access title affiliated with the British Medical Journal. It seems two researchers from Mount Sinai Hospital in Toronto, an endocrinologist and a statistician, have convinced themselves that the election of Donald Trump to the American presidency in November 2016 had a nerve-shattering effect on Ontario. The province of Ontario, that is, not the Los Angeles suburb.
Trump’s victory, according to the researchers, was so awful that, like a war or a disaster, it briefly altered the sex ratio in live births in the province. This is, I should say, a fairly well-established effect of extreme social traumas. When mothers experience physiological stress, the uterine environment becomes less hospitable, and male fetuses, more vulnerable to such changes, become less likely to survive pregnancy. (This makes sense from a Darwinian standpoint, because girls are more valuable than boys in replacing population after a calamity.)
In 2020 nobody should need me to say that a cute, counterintuitive scientific “result” like this, appearing in the newspapers on literally the day of its publication, should be greeted with extreme skepticism. The sex ratio at birth, always expressed in medical literature as a ratio of boys to girls, tends to hover around 1.06 under natural circumstances. (Even in an advanced civilization, things even out within the age cohort over the next 20 years as the lads explore dirt bikes, rock fights, and roofs.)
The Mount Sinai researchers, Ravi Retnakaran and Chang Ye, had records of the sexes of all children born in Ontario from April 2010 to October 2017. Even in a place as large as Ontario, the ratio naturally bounces around randomly between 1.1 and 1.0, and there are seasonal effects that the duo corrected for.
There is no obvious signature of a Trump effect in a scatterplot of the adjusted data, which serves as a warning that the effect being claimed may be an artifact of analysis. But when you apply “segmented regression” using the same parameters as Retnakaran and Ye, you find that the (unadjusted) ratio dipped to 1.03 in March 2017, the fifth month after Trump’s win, and then climbed to 1.08 in June and July before reverting to the long-term norm.
March 3, 2020
March 1, 2020
The Black Death of the 14th Century
Ed West looks at what we know of the spread of the worst plague to hit western Europe in the 1300s:

Map showing the spread of the Black Death in Europe between 1346 and 1353.
Map by Flappiefh via Wikimedia Commons.
There had never been a terror like it, and the “Great Mortality” as it was known — and much later, the “Black Death” — has seared itself in the European imagination. It changed the culture and tested the institutions of the time, and as we anxiously await the arrival of another — thankfully far less deadly — contagion from Italy its legacy and impact are worth remembering.
Epidemics have been around as long as civilization. Plaga — from the Greek for “strike” or “hit” — devastated classical Athens in the 5th century BC, when the historian Thucydides nursed sufferers; the Antonine Plague — probably smallpox or measles — killed as many as five million Romans at the empire’s peak. Far more deadly was the Plague of Justinian in the sixth century, which had a toll of 25 million and emptied whole regions of the eastern (Byzantine) Empire. Only in the 21st century did researchers confirm that this was the same illness that would appear eight centuries later — the Bubonic Plague.
Empires were particularly affected by these horrific epidemics, because empires are a form of globalisation — bringing different people into contact with each other and, more dangerously, into contact with other mammals, who act as disease vectors.
Another danger is climate change, which might turn a mild virus into a deadly one, or cause disease-carrying animals to migrate. This is what happened during the 14th century when the northern hemisphere became considerably cooler, soon after the Mongols had created the largest contiguous empire in history.
Genghis Khan’s people have generally received a historical bad press — people are more likely to recall the pyramid of skulls and the Tigris flowing black and red — yet their rule had opened up trade routes, allowing goods and people to cross Asia. Whether brought at the point of a sword or a trade deal, globalisation always brings the new: new cultures, new ideas, new languages and new pathogens.
Yersinia pestis had been living on gerbils and other rodents in central Asia, but unstable climate conditions in 1330s caused the disease to jump onto the rat flea. It was killing people by 1339, and in the mid-1340s Christians first heard of a disease raging in the Islamic world, which some at least took as divine punishment for the crusades.
After two centuries of Holy War this was understandable, yet hatred was not universal and during these conflicts Italian merchants had continually done business with Muslims, much to the Church’s fury. Now this trade, once the source of prosperity and peace, proved deadly: plague reached Europe via the Genovese colony of Caffa on the Black Sea (now Feodosiya, in the Ukraine). In October 1347, four ships escaping the diseased city had turned up in Sicily, condemning Italy to its fate.







