From autonomy to adaptation: the liberal body in Walter B. Cannon's physiology.

This article argues that Walter B. Cannon's changing model of the body tracked the transformation of twentieth-century American liberalism from laissez-faire autonomy to managed adaptation. At stake throughout was the problem of reconciling the autonomy of parts with the integrity of the whole. His early studies of digestion-an invisible hand within-aligned with faith in spontaneous self-regulation. Progressive-era work on fear and rage reframed disruption as purposeful mobilization, while World War I exposed its limits in shock and collapse. In response, Cannon articulated homeostasis as a grammar of resilience-feedback, buffers, and margins of safety-that recast purpose as regulation rather than destiny. Read together, these shifts show science and politics moving in tandem: autonomy preserved through rule-bound coordination in complex systems. This article thus revises the two-track portrait of Cannon (scientist here, citizen there) and situates his "social homeostasis" within interwar democratic reform and New Deal liberalism, where institutional redundancy and welfare safeguards stabilized freedom under strain. Recovering this liberal physiology clarifies how Cannon offered a democratic counterpoint to authoritarian decisionism and neoliberal discipline, and why his idiom of care, redundancy, and repair remains salient for crises of the twenty-first century.