Treatise on Tolerance (1763) is Voltaire's urgent brief against religious fanaticism and judicial cruelty, framed by the Calas affair. Combining forensic analysis with humane rhetoric, he dissects testimony, surveys comparative religions, and marshals history-from St. Bartholomew's Day to the Revocation of the Edict of Nantes-to urge civil concord. The prose is lucid and ironic, a model of Enlightenment polemic that weds reason to sentiment and appeals to natural law and common interest. Voltaire, the cosmopolitan philosophe of Ferney, had studied English toleration and distrusted clerical power-summed up in his cry, écrasez l'infâme. The 1762 judicial killing of the Protestant Jean Calas galvanized him. As satirist, historian, and tireless pamphleteer, he organized a rehabilitation campaign and distilled its lessons into this tract. This book remains indispensable to readers of law, religion, and human rights. Its clear arguments and cool indignation speak to debates over pluralism and due process today. Read it for its brisk reasoning, its exemplary evidence, and its humane vision-ideally in a reliable translation with notes clarifying its legal and historical allusions. Quickie Classics summarizes timeless works with precision, preserving the author's voice and keeping the prose clear, fast, and readable-distilled, never diluted. Enriched Edition extras: Introduction · Synopsis · Historical Context · Author Biography · Brief Analysis · 4 Reflection Q&As · Editorial Footnotes.