In our case studies, the aim is to apply the deliberations provided thus far to specific questions. In the first case study on the construction of (one’s own) biography, a psychological and philosophical perspective is taken, which is complemented in part by sociological aspects. The central reference point is initially the construction of World 2 in its interconnection with Worlds 3 and 1. Particular attention is paid to aspects of intersubjectivity and society, as developed from the extension of the theory of three worlds in Sects. 4.4 and 4.6 . The two case studies take different approaches: In the biographical case study, an argument is first developed from literature, which is then related to the considerations developed in this book. The case study on landscape conflicts is developed on the basis of comprehensive research (in particular our own theoretical work and empirical approaches). This different take is based on the idea of testing the developed approach in different ways.