Arnold Joseph Toynbee CH (1889-1975) was a British historian whose twelve-volume analysis of the rise and fall of civilizations, A Study of History, 1934-1961, was a synthesis of world history, a metahistory based on universal rhythms of rise, flowering and decline, which examined history from a global perspective. He began his teaching career as a fellow of Balliol College in 1912, and thereafter held positions at King's College London (as Professor of Modern Greek and Byzantine History), the London School of Economics and the Royal Institute of International Affairs (RIIA) in Chatham House. He was Director of Studies at the RIIA between 1925 and 1955. He worked for the Political Intelligence Department of the British Foreign Office during World War I and served as a delegate to the Paris Peace Conference in 1919. Toynbee presented history as the rise and fall of civilizations, rather than the history of nation-states or of ethnic groups. He identified his civilizations according to cultural or religious rather than national criteria. His works include: The Treatment of Armenians in the Ottoman Empire, 1915-16 (1916) and Turkey: A Past and a Future (1917).