This volume continues to explore the life and works of Auguste Comte during his so-called second career. It covers the period from the coup d’état of Louis Napoleon in late 1851 to Comte’s death in 1857. During these early years of the Second Empire, Comte became increasingly conservative and anxious to control his disciples. This study offers the first analysis of the tensions within his movement. Focusing on his second masterpiece, the Système de politique positive, and other important books, such as the Synthèse subjective, Mary Pickering not only sheds light on Comte’s intellectual development but also traces the dissemination of positivism and the Religion of Humanity throughout many parts of the world.