"[T]he entrepreneur is the focal point at which the dynamic forces... materialize into action for economic progress. The entrepreneur doesn't really respond primarily to the profit motive... entrepreneur and investor—are often not... the same person. Neither does the entrepreneur seek power... management and entrepreneur are not necessarily one. Nor do Veblenesque social status or Weberian Protestant righteousness seem to be the main motives... Rather, he seems to be the adventurer, a pioneer, an artist sculpting in economic clay. ...Is the dynamic force that sustains the industrialized economic system... an irrational spirit..? Many economists... postulate the existence of an "economic man," who rationally and objectively computes... and makes a decision that will maximize perofits. ...[T]his imaginary construct is the dynamic implicitly assumed for almost all of the economic theories from the late 1800s to the present. ...[T]hey continue to use it because without economic man most of their theories would be invalidated."