Columbia subject headings:
Harvard subject headings:
Aristotle
Hegel, Georg Wilhelm Friedrich, 1770-1831
Hobbes, Thomas, 1588-1679
Liberty--Philosophy
Slavery--Philosophy.
Princeton subject headings:
Aristotle.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Hobbes, Thomas, 1588-1679.
Liberty--Philosophy.
Slavery--Philosophy.