This section explores the four dimensions of learning, starting with individual learning as described by Bateson (1972), whose viewpoint is drawn into considerations about learning in teams in the context of work and organizational learning (Elkjaer, 2013; Engeström, 2001; Gherardi, 2001) including the lessons learned (East 1998). It becomes clear that the environment is important for the process of learning, and this section ends by briefly describing the requirements for successful lessons learned.