Spinoza Selected Works Collection - Paperbackby Baruch Spinoza (Author) This Collection includes most notable works of Baruch Spinoza Ethics, Theologico Political Treatise, On the Improvement of the Understanding. Ethics is undoubtedly Spinoza's greatest work an elegant, fully cohesive cosmology derived from first principles, providing a coherent picture of reality, and a guide to the meaning of an ethical life, it defines in turn the nature of God, the mind, the emotions, human bondage to the