The idea of race applied initially to class differences within European society, but was later applied to differences between Europeans and others, "and hence became marked by colour differences." (p. 8) In the twentieth century, racial theory was largely discredited by its association with Nazism, and the word "racism" entered the political vocabulary as a term of criticism, but the defeat of the Nazis led only to a recasting, not the destruction, of a belief in immutable differences among groups of human beings. This belief has been transferred to contemporary notions of culture.