"Roberto Mangabeira Unger, Obama's teacher at Harvard Law School and friend since then, has sought to hide his association with Obama. "I am a leftist," he later told an Obama biographer, "and by conviction as well as temperament, a revolutionary. Any association of mine with Barack Obama . . . could only do harm." Unger advocates what he terms "world revolution," a basic takeover of financial institutions and their reshaping to serve global economic equity. For instance, Unger calls for "the dismembership of the traditional property right" in favor of what he calls "social endowments." Most remarkably, Unger calls for a global coalition of countries--supported by American progressives--to reduce the influence of the United States. He calls this a "ganging up of lesser powers against the United States." He specifically calls for China, India, Russia, and Brazil to lead this anti-American coalition. Unger says that global justice is impossible when a single superpower dominates. He wants a "containment of American hegemony" and its replacement by a plurality of centers of power."