This 4th CROSSTALKS book documents 100 tangible local initiatives from all over the world that fit into a constructive and holistic movement for social and ecological change. Drawing from a pool of personally driven research and bottom-up projects, the book singles out 100 cases in different, yet interrelated domains. The selection itself was motivated by scientific researchers, architects, artists, political thinkers and entrepreneurs who try to make a positive difference in our quest for a future of prosperity, freedom and fun without undermining nature and humanity.