The idea of change fitness didn’t just come out of nowhere. It has been shaped by the ideas of great thought leaders, including Lewin, Sternberg, McAdams, Maruna, Koltko-Rivera, Prochaska & DiClemente, Seligman, Gergan, Bruner, Frankl, Kegan, and many others. In this article, I want to focus on one of these thinkers and show you how his work contributes to the change fitness concept. Kurt Lewin Kurt Lewin is very well known by people in the organisational change space. [...]