Columbia subject headings:
Benjamin, Walter, 1892-1940--Ethics.
Benjamin, Walter, 1892-1940--Philosophy.
Harvard subject headings:
Benjamin, Walter, 1892-1940--Ethics.
Benjamin, Walter, 1892-1940--Philosophy.
Princeton subject headings:
Benjamin, Walter, 1892-1940--Ethics.
Benjamin, Walter, 1892-1940--Philosophy.