the following periods: Primitive communism; Slave society; Feudalism; Capitalism; and Socialism. Regna Darnell and Frederic Gleach argue that, in the Soviet Union, the Marxian theory of history was the only accepted orthodoxy, and stifled research into other schools of thought on history. However, adherents of Marx's theories argue that Stalin distorted Marxism. Contemporary World history became a popular genre in the 20th century with universal history. In the 1920s, several best-sellers dealt with the history of the world, including surveys The Story of Mankind (1921) by Hendrik Willem van Loon and The Outline of History (1918) by H. G. Wells. Influential writers who have reached wide audiences include H. G. Wells, Oswald Spengler, Arnold J. Toynbee, Pitirim Sorokin, Carroll Quigley, Christopher Dawson, and Lewis Mumford. Scholars working the field include Eric Voegelin, William Hardy McNeill and Michael Mann. With evolving technologies such as dating methods and surveying laser technology called LiDAR, contemporary historians have access to new information which changes how past civilizations are studied. Spengler's Decline of the West (2 vol 1919–1922) compared nine organic cultures: Egyptian (3400–1200 BC), Indian (1500–1100 BC), Chinese (1300 BC–AD 200), Classical (1100–400 BC), Byzantine (AD 300–1100), Aztec (AD 1300–1500), Arabian (AD 300–1250), Mayan (AD 600–960), and Western (AD 900–1900). His book was a success among intellectuals worldwide as it predicted the disintegration of European and American civilization after a violent "age of Caesarism," arguing by detailed analogies with other civilizations. It deepened the post-World War I pessimism in Europe, and was warmly received by intellectuals in China, India, and Latin America who hoped his predictions of the collapse of European empires would soon come true. In 1936–1954, Toynbee's ten-volume A Study of History came out in three separate installments. He followed Spengler in taking a comparative topical approach to independent civilizations. Toynbee said they displayed striking parallels in their origin, growth, and decay. Toynbee rejected Spengler's biological model of civilizations as organisms with a typical life span of 1,000 years. Like Sima Qian, Toynbee explained decline as due to their moral failure. Many readers rejoiced in his implication (in vols. 1–6) that only a return to some form of Catholicism could halt the breakdown of western civilization which began with the Reformation. Volumes 7–10, published in 1954, abandoned the religious message, and his popular audience shrunk while scholars picked apart his mistakes. McNeill wrote The Rise of the West (1963) to improve upon