Rationality, Success, and Luck

Rationality, whatever exactly it demands of us, promotes success, whatever exactly that is. Some philosophers interpret that slogan as something that can provide them with a way of reductively explaining the demands of rationality by appeal to some independently intelligible notion of success: being rational, they might say, is just having whatever property it is that promotes success. Other philosophers may interpret the same slogan as something that can provide them with a way of reductively explaining the notion of success by appeal to some independently intelligible notion of the demands of rationality: having success, they might say, is just having whatever property it is that is promoted by being rational. In this paper, I argue that neither of these reductive efforts can succeed. I then argue that understanding the way in which rationality promotes success requires us to understand why the promotion relation between rationality and success can be severed by some kinds of luck, but not by others. To explain the kind of luck that can sever promotion, we should conceive of both rationality and success as distinct but related facets of something more fundamental than either of them.