Philosophy of war

The philosophy of war is the area of philosophy devoted to examining issues such as the causes of war, the relationship between war and human nature, and the ethics of war. Certain aspects of the philosophy of war overlap with the philosophy of history, political philosophy, international relations and the philosophy of law. Perhaps the greatest and most influential work in the philosophy of war is Carl von Clausewitz's On War, published in 1832. It combines observations on strategy with questions about human nature and the purpose of war. Clausewitz especially examines the teleology of war: whether war is a means to an end outside itself or whether it can be an end in itself. He concludes that the latter cannot be so, and that war is "politics by different means"; i.e. that war must not exist only for its own sake. It must serve some purpose for the state. Leo Tolstoy's 1869 novel War and Peace contains frequent philosophical digressions on the philosophy of war (and broader metaphysical speculations derived from Christianity and from Tolstoy's observations of the Napoleonic Wars). It was influential on later thought about war. Tolstoy's Christian-centered philosophy of war (especially his essays "A Letter to a Hindu" (1908) and "The Kingdom of God is Within You" (1894)) directly influenced Gandhi's Hinduism-centered non-violent resistance philosophy. Writing in 1869, Genrikh Leer emphasized the favorable effects of war on nations: "[...] war emerges as a powerful tool in the matter of improving the internal, moral and material life of peoples [...]." While Sun Tzu's The Art of War (5th century BCE), focuses mostly on weaponry and strategy instead of on philosophy, various commentators have broadened his observations into philosophies applied in situations extending well beyond war itself such as competition or management (see the main Wikipedia article on The Art of War for a discussion of the application of Sun Tzu's philosophy to areas other than war).