What I did not yet know so intensely was the hatred of the white American for the black, a hatred so deep that I wonder if every white man in this country, when he plants a tree, doesn't see Negroes hanging from its branches.
It is estimated that raising the retirement age to 70 would cut the shortfall by about 36%. But this proposal has some drawbacks. Women and men who have worked jobs that require manual labor all of their lives may not physically be able to do work until they are 70 years old.
Evolutionary biologists are not content merely to explain how variation occurs within limits, however. They aspire to answer a much broader question-which is how complex organisms like birds, and flowers, and human beings came into existence in the first place.

