Following a reflection on the method of rational reconstruction, the golden thread running through the book is recapitulated, emphasizing the new or controversial claims: Ludwig von Mises explicated praxeology in order to solve the problem of induction for the social sciences. Praxeology framed and defended as a conventionalist research program, accompanied by thymology and other empirical disciplines, is a legitimate and promising scientific endeavor with points of contact to mainstream economics and philosophy of science. The last words are surrendered to Richard von Mises.