This volume explores two traditions in practical philosophy: action theory, which concerns the nature of motivation for human action, and praxiology, the study of human action. By bringing different perspectives together, the volume strives to contribute to the international debate on theories of reasons for action as a philosophy of action.The volume consists of three main parts. The first part, "Reasons for Action," bridges the gap between reasons for action theories and praxiology. The second part of the volume, titled "Theories of Action," explores philosophical approaches to action. Finally, in the third part, "Applications," the contributors show several ways of applying praxiological ways of thinking and acting to the problems of reflection assessment, solving action incompleteness, and knowledge management.The ultimate goal of this volume is to broaden the scientific view of action: to establish a perspective on action that is permeated by moral theories on the one hand, and accounts focused on efficiency and economy of action on the other hand. This work is the newest volume in Transaction's Praxiology series.