Spinoza: practical philosophy

Deleuze examines Baruch Spinoza's philosophy, discussing Ethics (1677) and other works such as the Tractatus Theologico-Politicus (1670), providing a lengthy chapter defining Spinoza's main concepts in dictionary form. Deleuze relates Spinoza's ethical philosophy to the writings of Friedrich Nietzsche and Willem van Blijenbergh, a grain broker who corresponded with Spinoza in the first half of 1665 and questioned the ethics of his concept of evil.