There is currently no single work that covers the theory and practice of benefit corporation law, even though legislation has now been adopted by thirty-two US jurisdictions. There are already 3,000 benefit corporations in the United States, and the number of companies, as well as the number of investors, is increasing. The book is primarily intended to explain to lawyers why their clients may want this form of corporation, how to help them opt in, and then how to operate-although it's also intended to be usable by interested nonlawyers. It includes a context-setting discussion of the CSR movement and how traditional corporate law conflicts with the general move to responsible corporate governance. The appendices-forms for converting to benefit corporation status, a comparison of different statutes, a decision-making rubric, and more-will be particularly helpful to both practitioners and the DIY crowd-including start-ups that are trying to reduce legal costs.