Humans have 20 baby teeth followed by 32 permanent teeth, USUALLY!
The most commonly absent of the 32 adult teeth are the 2 maxillary (top) 3rd molars (aka Wisdom teeth). The second most commonly absent are 2 mandibular (bottom) 3rd molars (the other Wisdom teeth).
Some say that because 3rd molars are not useful to the adult dentition, and are often problematic (causing infection, pain, etc.), that humans are evolving beyond wisdom teeth and that is why either 1, 2, 3, or all 4 are sometimes absent.
I don’t know if a person should want all 4 present, and thus have wisdom, or have all 4 absent, and thus be evolved…
Just thought that would interest you.
-Zach