I’m a biologist and a cannabis enthusiast, and this is the first time I’ve come across the word “endogamy“. I had to look it up, and I’ll go back and see what you wrote. Just wanted to say thanks for bringing something new to my attention.
I've just realized that the entry "endogamy" in the English Wikipedia is much narrower than the same entry in other languages like Spanish and Portuguese.
I think the entry "inbreeding" written a little further down the page (1 Further information: Population genetics and inbreeding)
could help to have a better insight about what endogamy is, while NOT related with human populations.
Cheers