Lucretius as Theorist of Political Life is an interpretation of Lucretius' poem On the Nature of Things as a defense of philosophy given the irremediable tension between the competing claims of the philosophic and political life. The central issue is the need for, and attempt by, philosophy to justify and defend its way of life to the political community. This work uncovers how Lucretius' conception of the philosophic life, and the reaction to the human, religious, and political implications of the discovery of nature, distinguish his intention from the anti-theological animus that drives the politically and scientifically ambitious project of his modern appropriators.