This document provides an introduction to Jean de Bloch's book "The Future of War". The introduction highlights that Bloch was the most thorough student of war in all its details. His book "The Future of War" will remain the most important resource for those working to end war in the 20th century. The introduction argues that no book since Hugo Grotius's "Rights of War and Peace" has done more to influence practical progress towards peace and order in the world. It predicts that Bloch's book will be seen as equally powerful and far-reaching in its impact on reducing war in the 20th century. The introduction pays tribute to Bloch and his monumental work on analyzing war from a scientific and economic