What are some examples in history where certain people are excluded from the rest of society?

Question

besides the holocaust and blacks and whites in america

Answer 1

The Japaneses being excluded from work and certain public Establishment in Hawaii during WWII

Answer 2

people being banned to certain colonys because of leprosy or tuberculosis..

Answer 3

The so called Russian purges in the late 1930's, where thousand of people were killed on Stalins orders.Also many Russian hero's of the war, who became non-persons, and were written out of the official history books of the time.

Answer 4

women in Egypt and in some Middle east countries.

Answer 5

how about women being excluded from everything in some muslim countries?  that's not historical though, it still happens.