Abstract
Jeffrey Friedman credits Popper for calling attention to our scientific ignorance, but faults him for failing to recognize that we are at least as ignorant about politics as we are about science. He also credits Hayek for realizing that the public could not successfully engage in piecemeal economic regulation, but faults him for not recognizing that this is due to the public's ignorance of economic theory. Friedman suggests that the types of ignorance overlooked by Popper and Hayek compromise the very possibility of democracy—or at least social democracy. He assumes, however, that the success of social democracy and “piecemeal social engineering” depend upon their ability to produce “good” policies. This does not do justice to Popper's views about democracy and piecemeal engineering, and it also presumes an underlying economism that Popper criticized—but to which Friedman and Hayek adhere