Group dynamics lay at the core of Lewin’s social science and model of planned change. His research convinced him that “…it is easier to change ideology or cultural habits by dealing with groups than with individuals (my bolding) (Lewin, 1944, 1999, p289).”
Lewin’s definition of what a group is was simple and pragmatic. “The essence of a group is not the similarity or dissimilarity of its members, but their interdependence (Lewin, 1940, 1997, p68.)” For example, a family is a group, even though the individual members may in many ways have more in common with people outside the group (other men, other women, other children) than with those within. The same holds true for any other type of group, ...
