 In 1982, he published "The Pursuit of Power", which examined the role of military forces, military technology, and war in human history.In 1989 he published a biography of his mentor Arnold J. Toynbee.In 1992 review, he disagreed with Francis Fukuyama's argument in "The End of History and the Last Man" that the end of the Cold War meant that the American model of a capitalist liberal democracy had become the "final form of human government", as Fukuyama put it.