This book contributes to the developing dialogue between cognitive science and social sciences. It focuses on a central issue in both fields, i.e. the nature and the limitations of the rationality of beliefs and action. The development of cognitive science is one of the most important and fascinating intellectual advances of recent decades, and social scientists are paying increasing attention to the findings of this new branch of science that forces us to consider many classical issues related to epistemology and philosophy of action in a new light. This book encourages scholars from different fields (philosophy, cognitive science, sociology, and economics) who are interested in the dialogue between cognitive science and social sciences, to develop and analyze new perspectives that allow us to elucidate the mystery of rationality. What is rationality? What are its limitations? What rationality assumptions must be used to study social and economic phenomena? The target audience primarily comprises researchers and experts in the field.