To counter the optimists and their rosy outlook, it is necessary to keep the dark side of human affairs at the forefront of our consciousness; perhaps, after all, it is more rational to adopt an essentially pessimistic attitude. How pessimism has developed, and its multifaceted nature, forms the subject of this book. Pessimism deserves to be cultivated, and it is in the public interest that its cause is defended vigorously: it is as relevant today as it has ever been.