Columbia subject headings:
Harvard subject headings:
Ethics, Modern--18th century.
Ethics, Modern--19th century.
Kant, Immanuel, 1724-1804--Contributions in ethics.
Kant, Immanuel, 1724-1804--Ethics.
Nietzsche, Friedrich Wilhelm, 1844-1900--Contributions in ethics.
Nietzsche, Friedrich Wilhelm, 1844-1900--Ethics.
Princeton subject headings:
Ethics, Comparative.
Kant, Immanuel, 1724-1804--Ethics.
Nietzsche, Friedrich Wilhelm, 1844-1900--Ethics.