This book starts from the widely accepted premise that parts of knowledge can be defined as ability, aptitude, or "capacity for social action" (Stehr, 1994, p. 95) 1 and that the production and dissemination of knowledge are always embedded in specific environments (spatial context, spatial relations, and power structures). That point of departure makes it evident that the mutual relations between knowledge, action, and space are central research issues in disciplines dealing with human existence. For instance, acting under conditions of uncertainty, people must rely on experience gained in various situations and environments. To achieve their goals, they have to gather new information, acquire new knowledge, and develop new skills in order to cope with unexpected situations and unfamiliar challenges. Knowledge, experience, and information-processing are the foremost resources determining how aims of actions are set; how situations, opportunities, and risks are assessed; and how constellations, cues, and patterns are interpreted. They are the primary foundations for evaluating locations and spatial configurations, solving 1 The close relationship between knowledge and power is evident by the very fact that they have the same etymological roots. The word power derives from the Latin potere (to be able). The Latin noun potentia denotes an ability, capacity, or aptitude to affect outcomes, to make something possible. It can therefore be translated as both knowledge and power (see also