Yahwism (f. ~2000 BC)
dominant in Ethiopia, East Africa
Polytheistic, though with Yahweh as the highest God. Formed in the Levant, and spread around the Arabian peninsula and red sea. As attitudes changed in the homeland to become more monotheistic, more fringe followers in Africa stuck to the old ways. With the monarchs of ancient D'mt and Aksum being adherents, the religion managed to cling on.
Judaism (f. ~1000 BC)
dominant in the Levant
The monotheistic offspring of Yahwism. Repeated conquest by foreign powers led to a dispersal of the Jewish population around the globe, with only a small minority remaining in the homeland. Beginning in the 1800s however, many adherents began migrating back to the Levant, and created their own state. In the following century, many nations with large Jewish populations would offer incentives or outright deport them to this state, leading to the religions majority in the region.
Christianity (f. ~30 AD)
dominant in Europe, Oceania, South Africa, South America
A cult of personality based around one man, himself Jewish, successfully spreading across the Mediterranean leading to the conversion of the Roman Empire. Takes on a number of hellanistic influences as a result. As European powers colonise much of the world, they spread their religion with them.
Adamism (f. ~200 AD)
dominant in the Maghreb, West Africa
An early offshoot of Christianity, disagreeing with the choices of the church and putting much more focus on Gnosticism and the early stories, notably Adam and Eve and the Garden of Eden. Refer to their church as 'paradise', and often worship nude (as man was created nude in God's image). Missionaries would spread the religion to west Africa over the centuries.
Islam (f. ~600 AD)
dominant in Arabia, Persia, South Asia
A cult of personality based around one man, himself a great conqueror, successfully spreading his beliefs to areas conquered by himself and his descendants. Takes on a number of incluences from the surrounding Abrahamic religions.
Mormonism (f. ~1800 AD)
dominant in North America
A cult of personality based around one man, himself a Christian, successfully converting much of Anglo-America. Goes against a number of mainstream Christian teachings, such as allowing polygamy, and has a completely different canon deeming North America the holy land and positing that Jesus traveled there. Also has a much different view of the afterlife, promising a planet to all loyal followers.
Renkunism (f. ~1850 AD)
dominant in East Asia
A cult of personality based around one man, himself Chinese, successfully launching a rebellion and crowning himself Emperor. Seen as the brother of Jesus, the canon bases itself notably on Christianity and Islam while differing majorly in certain aspects. His offspring claim to be descended from God and thus divine. Through conquest and conversion, both Korea and Japan end up adherents.
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How's that? 7 Major Abrahamic religions with at least 100 million or so followers each, and everyone on earth subscribing to at least one of them 😉
I know im absolutely massacring butterflies by assuming history is the same with a POD 4000 years ago, but shush