Columbia subject headings:
Antiphon, approximately 480 B.C.-411 B.C.
Democritus.
Ethics, Ancient.
Ethics.
Protagoras.
Harvard subject headings:
Antiphon, approximately 480 B.C.-411 B. C--Ethics.
Antiphon, approximately 480 B.C.-411 B.C.--Contributions in ethics.
Democritus, approximately 460 B.C.-approximately 370 B.C.--Contributions in ethics.
Democritus, approximately 460-approximately 370 B. C--Ethics.
Ethics, Ancient.
Protagoras--Contributions in ethics.
Protagoras--Ethics.
Princeton subject headings:
Antiphon, approximately 480 B.C.-411 B.C.
Democritus, approximately 460 B.C.-approximately 370 B.C.
Ethics, Ancient.
Protagoras.