Humans live & fit together much like the pieces in a jigsaw puzzle I always think. There are several types of person just as there are several shapes of pieces and in living we all fit together. Oh yes there are bumps & scrapes as pieces try to match & some don’t fit into a particular configuration but we all strive to find a place to fit in and survive.
We do make slight changes to fit in but in general our individual characters remain unchanged so much so that when we look at a community and the humans in it we end up classifying individuals as basically mean, generous, etc. of which there are not unlimited different types.
Humans make slight changes to survive though our basic character stays the same.