Fascinating and thought-provoking, this book shows how the methodology of Austrian economics can be justified and strengthened by grounding it in the philosophy of Wittgenstein. Frege and Wittgenstein argued that whatever counts as thought must embody logical principles. Their arguments also support the conclusion that whatever constitutes action must embody economic principles. In this incisive text, the author shows that this confirms the claims of Austrian economists such as Mises and Hayek that the laws of economics are a priori rather than empirical