Comment by geeostation

Interesting you said Abrahamic religions, While impact of chrisianity on Europe, Middle East, Americas has been well documented.

There hasn't been much of discussion or writing about the extinction of cultures, syncretism, open border civs at the hands of Islam.

Greek / Roman / Indian influence in Eurasia to Indonesia is probably another tragedy that the world forgot.

Only pockets like Bali remain from that era now.