This text is an introduction to Baruch Spinoza's life and philosophy, taken from Paul Strathern's "Spinoza in 90 Minutes". Strathern presents a concise biography of Spinoza, highlighting his expulsion from the Jewish community and his subsequent career as a lens grinder. The book also explains Spinoza's philosophical system, a complex, mathematically-structured panteism that views God and Nature as identical. Strathern contrasts Spinoza's ideas with those of his contemporaries, showing their influence on modern thought in areas such as ecology and politics. Finally, the text includes excerpts from Spinoza's writings and a chronology of important philosophical dates, providing readers with further context and resources.