"American humorist, critic and actor" Robert Benchley, in 1920 >
There may be said to be two classes of people in the world; those who constantly divide the people of the world into two classes, and those who do not. Both classes are extremely unpleasant to meet socially, leaving practically no one in the world whom one cares very much to know.
1923 >
https://en.wikiquote.org/wiki/Robert_Benchley
In America there are two classes of travel — first class, and with children.
amusing, many in US on "right"
like self identifying (while
disliking "republican") , while many on "left" avoid labels except "democrat" , and many on all sides like labeling those they disagree with
many supposedly inclusive are often worst about exclusion
GUWonder mentions social libertarian, that is what many mean by social liberal but they are mis using it, in terms of how various things have developed over time especially in western politics
labels are likely 'less informative' in US because it is a two (instead of multiple) party government