The latest age of slavery has been the enslavement of Blacks by White people. The memory of this age will persist in the thinking of Black people until they have vindicated themselves.
This tragic and historic event, the resulting bitter feeling, and the yearning or the vindication of a whole race, constitute a psychological motivation of Black people to vengeance and triumph that cannot be disregarded. In addition, the inevitable cycle of social history, which includes the Yellow people's domination of the world when it marched from Asia, and the White people's carrying out a wide-ranging colonialist movement covering all the continents of the world, is now giving way to the re-emergence of Black people.
Black people are now in a very backward social situation, but such backwardness works to bring about their numerical superiority because their low standard of living has shielded them from methods of birth control and family planning. Also, their old social traditions place no limit on marriages, leading to their accelerated growth. The population of other races has decreased because of birth control, restrictions on marriage, and constant occupation in work, unlike the Blacks, who tend to be less obsessive about work in a climate which is continuously hot.