 This aesthetic includes a preoccupation with competing models of political and economic organization.The environmental, economic, and social themes in Robinson's oeuvre stand in marked contrast to the right-libertarian science fiction prevalent in much of the genre (Robert A. Heinlein, Poul Anderson, Larry Niven, and Jerry Pournelle being prominent examples), and his work has been called the most successful attempt to reach a mass audience with a left wing and anti-capitalist utopian vision since Ursula K. Le Guin's 1974 novel, "The Dispossessed".Robinson's work often features scientists as heroes.