Businesses have a big role to play in a capitalist society. They can tip the scales toward the benefit of the few, with toxic side effects for all, or they can guide us toward better, more equitable long-term solutions. Christopher Marquis tells the story of the rise of a new corporate form—the B Corporation. Founded by a group of friends who met at Stanford, these companies undergo a rigorous certification process, overseen by the B Lab, and commit to putting social benefits, the rights of workers, community impact, and environmental stewardship on equal footing with financial shareholders. Informed by over a decade of research and animated by interviews with the movement’s founders and leading figures, Marquis’s book explores the rapid growth of companies choosing to certify as B Corps, both in the United States and internationally, and explains why the future of B Corporations is vital for us all.