"Yarvinian evolution" is the system by which dumb people arrive at dumb ideas instead of smart ideas because they think the dumb idea "sounds more badass".
The name is a hybrid between "Darwinian evolution" and "Yarvin" as in Curtis Yarvin, the "Dark Enlightenment" blogger-turned-philosopher whose grade-school-level dumb ideas were taken seriously by the likes of Peter Thiel and J. D. Vance.