I'm wondering if this is a predictable societal function, and if we know what the influencing factors are.

For example, blacks have been discriminated against at varying levels since Europeans first landing in the Americas till today.

Asians have been discriminated against in some similar, some different ways, for at least a 1.5 century.

Italians and Irish went through periods of discrimination, but it ended.

Native people have been treated badly since Europeans arrived.

I'm wondering if there are any studies on what the different factors are that create or support discrimination, how they applied to different groups, and also how that might apply to the culture(s) of the US vs. other countries/cultures (like Japan, African countries, England, Brazil, etc.)

Also, i would love to see a timeline of immigration to acceptance of ethnicities in the US.