Known most effective for his Wolfson Background Prize-winning work Iron Kingdom: The Rise and Downfall of Prussia, 1600–1947, Clark also posted a biography of Kaiser Wilhelm II and a LA Times Reserve Prize-winning work entitled The Sleepwalkers: How Europe VISITED Battle In 1914. After completing his undergraduate education on the School of Sydney as well as the Freie Universitat Berlin, he received his doctorate ever sold from the School of Cambridge. In the first 1990s, he started teaching in Cambridge’s Contemporary European History section. His relationship to artwork historian Nina Lubbren led to sons called Alexander and Josef. He and early 20th-century article writer G.M. Trevelyan had been both Cambridge-educated historians.