The idea of "race" and "racial superiority" has caused a lot of trouble in the world. Last week an international group of distinguished scientists working for UNESCO issued a report on what science knows about this emotional subject.
"To most people," said the report, "a race is any group of people whom they choose to describe as a race. Thus many national, religious, geographic, linguistic or cultural groups have, in such loose usage, been called 'race.' " Such groups "do not necessarily coincide with racial groups, and the cultural traits of such groups have no demonstrated genetic connection with racial traits."
Race does...