PART I: THE SUBJECTIVE THEORY OF VALUE AND PRAXEOLOGY -- MENGER’S SUBJECTIVE THEORY OF VALUE: CHOICE UNDER UNCERTAINTY -- MENGER’S SUBJECTIVE THEORY OF VALUE: CHOICE UNDER UNCERTAINTY -- MISES’ PRAXEOLOGY -- MISES’ APRIORISM -- The Universality of Praxeology -- PRAXEOLOGY AND LEADERSHIP -- LEADERSHIP AS A PROCESS OF EXCHANGE UNDER UNCERTAINTY -- DISCUSSION SCOPE AND OUTLINE -- PART II: THE PRINCIPLES AND METHODS OF MISES' PRAXEOLOGY -- METHODOLOGICAL APRIORISM -- METHODOLOGICAL PRINCIPLES REGARDING THE ROLE OF EMPIRICAL DATA IN PRAXEOLOGY -- THE THEORY OF HUMAN ACTION, ITS A PRIORI CATEGORIES AND ASSUMPTIONS -- METHODOLOGICAL PROCEDURES IN PRAXEOLOGY -- DISTINGUISHING FEATURES OF PRAXEOLOGY -- PART III: ENTREPRENEURSHIP, IMITATION AND INNOVATION -- PRAXEOLOGY VERSUS SOCIAL EVOLUTION AS A PRIORI FRAMEWORKS -- ENTEREPRENURSHIP AS EVOLUTION OF ACTION -- THE ULTIMATE A PRIORI OF DISCOVERY -- THE LOGIC OF PERCEIVED POSSIBILITIES: PRAXEOLOGY AND THE PROCESS OF EVOLUTIONARY LEARNING -- DEFINING INNOVATION FROM A PRAXEOLOGICAL PERSPECTIVE -- THE "A PRIORI" CATEGORY OF IMAGINATION -- SOME A PRIORI ASPECTS OF LEARNING -- PART IV: THE HUMAN ACTION OF LEADERSHIP -- CONCEPTUALIZING LEADERSHIP -- THE FOLLOWER PURPOSEFUL RESPONSE -- THE CATEGORY OF THE RESPONSE CUE (R CUE) -- THE SUBJECTIVE THEORY OF VALUE AND FOLLOWING -- UNCERTAINTY -- POWER AS A CATEGORY OF LEADERSHIP ACTION -- META LEADERSHIP -- PART V: SYNTHESIS -- THE PRINCLES OF PRAXEOLOGY AND ITS ROLE AS A METHOD OF SOCIAL SCIENCE -- EVOLUTION AND CHANGE IN ACTION -- LEADERSHIP -- Epilogue.