The weight of this contribution -- one among so many today --to the thought of the West on its future is derived from its orientation and incisiveness. With his long experience in international relations, Sir Alfred Zimmern has produced a book which will give Americans an opportunity to understand the European attitude toward peace through unity and respect for America's role in securing a meaningful peace, while at the same time pointing out to Europe America's unique contribution to world harmony. He traces the history of world peace from Greek and Roman times, giving great attention to the period from the first World War on. Wilson brought to the problem of world order a concept new to Europeans, accustomed to sovereignty, in his community of nations, and he did so from the view of a political scientist rather than lawyer. The progress of two wars, the interim in which the League of Nations was born an ailing child, the increasing teamwork through the Atlantic Charter, attempts to install the Baruch plan for atomic energy control, the meeting of the United Nations is handled with depth and precision. The author considers the UN, states that a true regionally derived team of dedicated men should take the place of the faltering Security Council, as the executive body, and looks with hope toward a greater growth in skill and understanding in handling a world peace in which free men stand together.