Take a look at old photos. You see a sign in a town in America, dating from the 1950s, saying NO NIGGERS, NO JEWS, NO DOGS

There is not just one. In other public places there are notices on toilet walls or near water fountains: this side for 'whites' and that side for 'coloreds'.

Segregation: 'Negroes', 'Jews', people of yellow skin, brown skin, and dogs are not allowed in certain places. Any change is forbidden. A civil law from Virginia in 1847 stated th