The Story of Philosophy was preceded by a number of pamphlets in the Little Blue Books series of inexpensive worker education pamphlets. They proved so popular they were assembled into a single book and published in hardcover form by Simon & Schuster in 1926. Philosophers profiled are, in order: Plato, Aristotle, Francis Bacon, Baruch Spinoza (with a section on Descartes), Voltaire (with a section on Rousseau), Immanuel Kant (with a section on Hegel), Arthur Schopenhauer, Herbert Spencer, and Friedrich Nietzsche. The final two chapters are devoted to European and then American philosophers. Henri Bergson, Benedetto Croce, and Bertrand Russell are covered in the tenth,
Bertrand Russell and with Germany "freed from all alien armed forces and pledged to neutrality in any conflict between East and West". US Secretary of State John Foster Dulles replied for Eisenhower. The exchange of letters was published as "The Vital Letters of Russell, Khrushchev, and Dulles". Russell was asked by "The New Republic", a liberal American magazine, to elaborate his views on world peace. He urged that all nuclear-weapons testing and constant flights by planes armed with nuclear weapons be halted immediately, and negotiations be opened for the destruction of all hydrogen bombs, with the number of conventional nuclear devices limited