Why do we humans stereotype?

There are lots of stereotypes in this world, here I have an example:

In China, there is a thing called “white monkey jobs”. Here is a very interesting video about it.

[youtube]https://www.youtube.com/watch?v=D-DJrrMbLC4[/youtube]

The word ‘white monkey jobs’ is not a Chinese word, this word is created and used only among western expats in China to mock the issue of a so-called ‘white priviledge’ in China.

Do you know any other funny stereotypes? why do we humans love stereotypes? Is there a practical usefulness behind those stereotypes for the very people who believe in them?

An evolutionary trait to facilitate communication and survival.

Monkey’s alarm calls reveal predator location.
nature.com/news/monkey-s-ala … on-1.13662

But what do monkeys’ alarm calls have to do with stereotype?

Stereotypes are integral to every system in history, granting identity and allowing people to discriminate with a clear conscience.