James Turner Johnson 
Ideology, Reason, and the Limitation of War [PDF ebook] 
Religious and Secular Concepts, 1200-1740

The fundamental aims of this book are two: to explore the interaction between religion and secular society in the formation as well as the dissolution of just war doctrine; and to investigate just war doctrine as an ideological pattern of thought, expressive of a greater ideology.
The author reconstructs the development of classic just war doctrine, showing it to be a product of secular and religious forces. From it he traces the growth of the doctrines of holy war and of modern just war. He demonstrates that the blending of two distinct traditions in the late Middle Ages has its counterpart in the century following the Reformation. The secularized just war doctrine exemplified in the writings of Grotius, Locke, and Vattel are related to the problems of war in our time.
Originally published in 1975.
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