Summary: Industrial capitalism is failing to provide for the long-term needs of human beings. Holders of political and economic power put the interests of corporations ahead of those of people, and corporations are by law and nature focussed exclusively on maximizing profits by externalizing costs. To reform capitalism, we should create and empower non-governmental, non-profit trusteeships that exclude some common assets from exploitation, charge rents for others, and pay dividends to the public. The author describes how this arrangment would work and what its probable economic consequences would be for a number of kinds of commons, such as air, water, land, ecosystems, and spectrum, concluding with advice to parents, workers, capitalists, entrepreneurs, lawyers, economists, religious leaders, and politicians about what each of these groups can do to facilitate the transition.