Lessing is the most representative figure of the German Enlightenment. His defence of Spinoza, who had traditionally been condemned as an atheist, provoked a major controversy in philosophy, and his publication of Reimarus’ radical assault on Christianity led to fundamental changes in Protestant theology. This volume presents the most comprehensive collection in English of Lessing’s philosophical and theological writings, several of which are translated for the first time. They are translated and edited by H. B. Nisbet, who also provides an introduction that sets them in their historical and philosophical contexts.