Margin
Richard Swenson, MD

Summary
Margin by Richard Swenson, MD (1992, revised 2004) makes the case that the defining problem of modern life is the progressive loss of margin — reserve capacity in every dimension of life (energy, finances, time, relationships, attention, faith where relevant). Swenson argues that health, relationships, and meaning require some unused capacity to absorb life's shocks, and that the cultural drive to fill every margin with productivity systematically degrades the reserves that health and resilience require. The book is short, applied, and unusually durable across decades, because the problem it names is structural rather than topical.
About
Richard Swenson is a physician, futurist, and author who has written extensively on the relationship between modern pace of life, stress, and health. Margin (first published 1992, revised 2004) is his foundational work on restoring reserve — physical, emotional, relational, and temporal — as a precondition for health and meaning.
Why I recommend it
Margin is the book I recommend to patients whose labs and body composition are fine but whose lives have no slack in them. The framing — that health is downstream of margin, not upstream of it — is the missing variable in a lot of clinical conversations about burnout, recovery, and chronic stress.
https://drianquinn.com/recommendations/books/margin/
