Recent advances in the culture of salmon point the way to a significant expansion of the scale on which the resource can be effectively managed. From the purely local efforts focused primarily on mitigation of the losses of spawning areas that have characterized traditional salmon culture, we can now progress to the manipulation of stocks on a worldwide scale. International cooperation in the management of salmon as a basic range crop for subpolar seas could provide the seed for the development of a truly international system of planetary aquaculture in which oceans and seas will be managed as range and farmland.