Columbia subject headings:
History--Philosophy.
History.
Tolstoy, Leo, graf, 1828-1910--Knowledge and learning.
Tolstoy, Leo, graf, 1828-1910--Philosophy.
Tolstoy, Leo, graf, 1828-1910--Political and social views.
Harvard subject headings:
History--Philosophy
Tolstoy, Leo, graf, 1828-1910--Knowledge--History.
Tolstoy, Leo, graf, 1828-1910--Philosophy.
Tolstoy, Leo, graf, 1828-1910--Political and social views.
Princeton subject headings: