The Science of Change integrates over 50 years of research in many fields into a unifying theory of behavioral change, Intentional Change Theory (ICT). This multi-level, fractal theory is equally applicable to getting better at playing the guitar, achieving a department sales target, rallying a community to action over a toxic spill, or mobilizing a country to fight a pandemic. In this book, Richard E. Boyatzis examines each phase and principle of the theory and provides examples of sustained, desired change at the individual, dyadic, team, organizational, community, and country level.