The book is exceptional because it applies the notion of foms of life to the context of human action. It provides answers to the following questions: Why do we act in a specific way? Why do we make particular decisions? Does one's form of life and language games determine our actions and decisions? Wittgenstein proposes a holistic method which enables us to give coherent answers to these questions. To answer the question of the contents of actions and decisions we have to explain how we have institutionalized these actions or decisions. To this aim we shall reveal the frame within which language games are introduced and have come to function as practice and custom. The scheme of order underlying the language games is illustrated. Human actions and decisions follow particular rules. By highlighting the underlying scheme of order we may gain a perspicuous view of these rules. The aim of this book is to show that actions and decisions generate rational choice. This choice is explained by demonstrating the particular functions of the language games involved.