Columbia subject headings:
Darwin, Charles, 1809-1882--Influence.
Philosophy, Russian--19th century.
Philosophy, Russian--20th century.
Harvard subject headings:
Darwin, Charles, 1809-1882--Influence.
Philosophy, Russian--19th century.
Philosophy, Russian--20th century.
Princeton subject headings:
Darwin, Charles, 1809-1882--Influence.
Philosophy, Russian--19th century.
Philosophy, Russian--20th century.