One of the great minds of the 20th century, Bertrand Russell explored philosophy, mathematics, and a variety of other intellectual, political, historical, and social issues in his lifetime. In this indispensable and easily accessible guide, drawn from his books and essays, readers will find Russell’s fundamental principles, from objectivity to ontological arguments to logical certainty, in his own words. Russell also explored topics such as war, evil, and the purpose and goal of human existence. Russell’s intellect transcends time and remains a relevant source of inspiration and thought today.