Colby Cosh linked to this article in Popular Archaeology, which discusses an interesting idea about what triggered the rise of Christianity, Judaism, Hinduism, and Islam:
It seems almost self-evident today that religion is on the side of spiritual and moral concerns, but that was not always so, Baumard explains. In hunter-gatherer societies and early chiefdoms, for instance, religious tradition focused on rituals, sacrificial offerings, and taboos designed to ward off misfortune and evil.
That changed between 500 BCE and 300 BCE — a time known as the “Axial Age” — when new doctrines appeared in three places in Eurasia. “These doctrines all emphasized the value of ‘personal transcendence,'” the researchers write, “the notion that human existence has a purpose, distinct from material success, that lies in a moral existence and the control of one’s own material desires, through moderation (in food, sex, ambition, etc.), asceticism (fasting, abstinence, detachment), and compassion (helping, suffering with others).”
While many scholars have argued that large-scale societies are possible and function better because of moralizing religion, Baumard and his colleagues weren’t so sure. After all, he says, some of “the most successful ancient empires all had strikingly non-moral high gods.” Think of Egypt, the Roman Empire, the Aztecs, the Incas, and the Mayans.
In the new study, the researchers tested various theories to explain the history in a new way by combining statistical modeling on very long-term quantitative series with psychological theories based on experimental approaches. They found that affluence — which they refer to as “energy capture” — best explains what is known of the religious history, not political complexity or population size. Their Energy Capture model shows a sharp transition toward moralizing religions when individuals were provided with 20,000 kcal/day, a level of affluence suggesting that people were generally safe, with roofs over their heads and plenty of food to eat, both in the present time and into the foreseeable future.