My dentist says that a small but increasing percentage of the population (10%?) has no wisdom teeth.
Me, I have the normal 4, but I got lucky- I’ve got room in my mouth for them. (Although they hurt like all holy heck coming in).
I only had three, too.
I also have three (one emerged), with no pressing need to have any removed.
Wisdom teeth do have two evolutionary purposes, sort of: to help economically support dentists, orthodontists, and oral surgeons (by any reasonable definition, a fairly smart subset of the population); and as another bullet point in the argument against the “Intelligent Design” version of Creationism.
[the 3-wisdom-tooth version]