This important book is about truth, and the enemies of truth, and the wars that are fought between them. As Simon Blackburn says in his introduction, the ground is complicated, strewn with abandoned fortresses and trenches, fought over by shifting alliances. Truth is an essential sure-footed guide through the territory, from classical to modern times. It looks at relativism and absolutism, toleration and belief, objectivity and knowledge, science and pseudo-science, and the moral and political implications, as well as the nuances, of all these.