Capitalism has lost its way.

Every week brings fresh news stories about businesses exploiting their staff, avoiding their taxes, and ripping off their customers. Every week, public anger at the system grows. Now, one of Britain’s foremost entrepreneurs intervenes to make the case for putting business back firmly in the service of society, and setting out on a new path to a kinder, fairer form of capitalism.

Drawing on four decades of hands-on management experience, the founder of Richer Sounds argues that ethically run businesses are invariably more efficient, more motivated and more...