DETAILS:-
Vol.13: Socrates;
Vol.14: Marcus Tullius Cicero;
Vol.15: St. Augustine of Hippo;
Vol.16: St. Thomas Aquinas;
Vol.17: Marsilio of Padua and William of Ockham;
Vol.18: Jean Bodin and Hugo Grotius;
Vol.19: Adam Smith;
Vol.20: Montesquieu and Voltaire;
Vol.21: David Hume;
Vol.22: Immanuel Kant;
Vol.23: Thomas Paine;
Vol.24: Alexis de Tocqueville;