Columbia subject headings:
Darwin, Charles, 1809-1882.
Evolution--History.
Naturalists--England--Biography.
Social evolution--History.
Harvard subject headings:
Darwin, Charles, 1809-1882
Evolution--History
Naturalists--England--Biography
Social evolution--History.
Princeton subject headings:
Darwin, Charles, 1809-1882.
Evolution--History.
Naturalists--England--Biography.
Social evolution--History.