The Individual in the Darwinian Revolution

of where our knowledge comes from. Is it from within, perShaps from reason, or perhaps innate? Or do we derive it from without-from experience or authority? Certain mystics and idealists might prefer to say that it comes from beyond. The history of science provides us with a wealth of materials that shed a certain amount of light upon such matters. But the subject does not yield simple answers. To provide even a minimally satisfying explanation of how scientific knowledge develops, we must study the problem from several points of view. A logician's analysis of how theories are tested can be most illuminating, but it really doesn't answer the question about their source. Sociology and psychology may tell us how scientists behave in one kind of environment or another, but so much depends upon particular events that the student of scientific method needs considerable