An Enquiry Concerning the Principles of Morals

Phaedo - Plato

Superstition in All Ages

Symposium

The Problems of Philosophy

Phaedrus - Plato

Ethics of Aristotle

An Enquiry Concerning Human Understanding

An Essay Concerning Human Understanding

Utilitarianism

Beyond Good and Evil

A Discourse Upon The Origin And The Foundation Of The Inequality Among Mankind

Leviathan

The World As Will and Idea

On Liberty

Politics: A Treatise on Government - Artistotle

The Critique of Pure Reason

The Analysis of Mind

The Social Contract - Jacques Rosseau

Thus Spoke Zaratustra