Life does not become empty and meaningless in a godless universe. This is the contention at the heart of humanism, the philosophy concerned with making sense of the world through reason, experience and shared human values. In this thought-provoking introduction, Peter Cave explores the humanist approach to religious belief, ethics and politics, and addresses key criticisms. Revised and updated to confront today's great crises - the climate emergency and global pandemics - and the future of humanism in the face of rapid technological advancement, this is for anyone wishing better to understand what it means to be human in the twenty-first century.