This book builds up on the experience and lessons learnt by academics at the Graduate Program in Sustainability Science, Global Leadership Initiative (GPSS-GLI) at the University of Tokyo. A number of scholars in the new field of sustainability science describe how field methods and exercises are carried out in this discipline, together with the theoretical basis for such exercises. Case studies of various countries around the world where these exercises are carried out are showcased, emphasizing the various socio-economic considerations and problems facing humanity and possible ways forward to build more sustainable and resilient societies. The final objective is to enrich the field of sustainability science by describing the novel aspects used in the field exercises carried out by practitioners of this cross-disciplinary field.