Book
Kegan R, Lahey LL. Immunity to Change: How to Overcome It and Unlock the Potential in Yourself and Your Organization. Boston: Harvard Business Review Press; 2009. 320 p.
Why we cite it
Introduces the concept of "immunity to change" — a psychological dynamic where hidden competing commitments prevent people from making changes they genuinely want to make. Directly relevant to dietary behavior change because it explains why someone can sincerely commit to eating differently yet consistently fail: they may hold unconscious competing commitments (e.g., fear of social isolation from eating differently, or using food as emotional comfort) that actively work against the conscious goal. The four-column technique provides a structured method for surfacing these hidden barriers.
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