system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did the Abrahamic Religions become such a behemoth? Why aren't we all going to temples to pray to Odin or Zeus?
gpt
There's a good book called Things Fall Apart by Chinua Achebe that touches on why Christianity was such a powerful colonizing force versus religions like Norse paganism (Or Igbo religion in the book's case)

One big thing is that the people spreading Christianity were very powerful and had a lot of force to back up their proselytizing.  Beyond that, when you look at Norse religion and similar old polytheistic religions, they tend to be very inegalitarian.  With Odin, if you didn't die on your feet like a man you went to hell.  With Igbo shamanism, a man who didn't have wives and cattle and property was less than nobody.

As you'll see if you read that book, the people who didn't succeed in the old structure were drawn to Christianity as a way to get what they can't have as pagans.  This splintered traditional societies and led to internal conflicts, preventing them from putting up a unified resistance to colonization by Christianity.

When you add in the force mentioned above, you've basically got natural selection going on. The ones who are amenable to Christian/colonial (you really can't separate them) power survive and get to work for the invaders, while the ones who fight back (usually the ones with something to lose in the new power structure) get killed.  The path to power changes and the cultural values change with it.