Hugo Grotius, The Law of War and Peace (1625)

Writing in the early 17th century, when much of Europe was in turmoil, Grotius sought to identify principles of law that might offer a peaceful basis for resolving and preventing wars. His three-volume book, first published in 1625 and dedicated to Grotius' patron at the time, Louis XIII, is regarded as the foundation of modern international law. In The Law of War and Peace, Grotius developed a system of principles of natural law, which are held to be binding on all people and nations regardless of local customs.

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