A reflection on Donald Schön's 1970 REITH lecture 'Dynamic Conservatism,' which argues that social systems — including organizations — actively resist change rather than passively resisting it. Key ideas include the interlocking nature of social structure, technology, and theory within systems; the concept of 'thresholds of change' that must be reached before transformation occurs; and practical strategies like minimizing surprise and exploiting resistance energy to drive change in a different direction.