Since its inception pragmatism has been criticized as anti-metaphysical, its focus on scientific method and critical inquiry viewed as undermining one of the very foundations of traditional philosophy. Here, Sidney Hook begins his distinguished philosophical career by juxtaposing these terms to show that the pragmatic method cannot begin to help us solve human problems without holding to a particular view of how the world is arranged both physically and conceptually. But this does not imply that pragmatism holds to a traditional, rigid metaphysic; rather, it has an interactive dimension in which human problems are viewed as contingent upon the ways we structure our questions and design methods for finding solutions, both of which can change - and the implied metaphysic evolve - as inquiry uncovers new information about ourselves and the world.
Sidney Hook was an American pragmatic philosopher known for his contributions to public debates. A student of John Dewey, Hook continued to examine the philosophy of history, of education, politics, and of ethics. He was known for his criticisms of totalitarianism (fascism and Marxism–Leninism). A pragmatic social democrat, Hook sometimes cooperated with conservatives, particularly in opposing communism. After WWII, he argued that members of conspiracies, like the Communist Party USA and other Leninist conspiracies, ethically could be barred from holding offices of public trust.