Sustainable development stirs up debate about the capacities of political steering and governance. The complexity of the task expounds limits of steering in three dimensions: goals, knowledge, and power: Sustainability goals are subject to changing and controversial risk perceptions, values and interests. Moreover, knowledge of the coupled dynamics of society, technology and nature is limited. Finally, the power to shape structural change in society and technology is distributed across a multitude of actors and societal subsystems. Steering attempts therefore have to cope with conflict and...