Theories of group processes have been and are being applied usefully to nat
ural situations. We review a selection of these theories and examine differ
ent types of applications and interventions to which they have led. We then
offer a typology of application, five "stages" with examples. As theoretic
al application proceeds, issues of complexity, rules of correspondence, and
competing social interests increase the difficulty of that work, yet the b
enefits are considerable for theoretical development.