Business firms are ubiquitous in modern society, but an appreciation of how they are formed and for what purposes requires an understanding of their legal foundations. This book provides a scholarly and yet accessible introduction to the legal framework of modern business enterprises. It explains how the legal ideas allow for the construction and recognition of business firms as persons having rights and responsibilities. It also shows how law sets the boundariesof firms. Specific applications include contributions to debates about executive compensation and political free-speech rights of corporations. Anyone who wishes to have a deeper understanding of thenature of business firms and their role in modern society will benefit from reading this book.