--Introduction: On the Value of Scepticism
--Dreams and Facts
--Is Science Superstitious?
--Can Men be Rational?
--Philosophy in the Twentieth Century
--Machines and the Emotions
--Behaviourism and Values
--Eastern and Western Ideals of Happiness
--The Harm that Good Men Do
--The Recrudescence of Puritanism
--The Need for Political Scepticism
--Free Thought and Official Propaganda
--Freedom in Society
--Freedom Versus Authority in Education
--Psychology and Politics
--The Danger of Creed Wars
--Some Prospects: Cheerful and Otherwise
Index