It seems to me, especially within the past couple decades, that the longterm effects of the Frankfort school,
social media, and modern society in general have created such mental conformity that I only have to glance
at someone to have a very good idea of what their views are on nearly every issue. This can be reflected in manner of dress, comportment, and even physiognomy. 
It's almost as if people want to mold themselves into certain archetypes that the social engineers have sought to create.
We even have new terms in our language that immediately identify these categories of people:
Sally Soccer Mom
Gym Bro
Joe Six Pack
ghetto mama
strong independent woman/feminist
meth head
etc.

Each of these terms conjures up mental images of people whom we have all encountered over and over and over.
My father used to say that God must love such people because he sure created a lot of them!
It nonetheless disturbs and saddens me that people have become so damned predictable and boring.

The movie 'The Breakfast Club' came out when I was in high school and it listed all the main stereotypes of the time.  For myself I'd say these things have always been around but, like slang words that come and go, the titles might change.  (In case one isn't already aware, the movie is junk)