Habit is… the enormous flywheel of society, its most precious conservative agent. It alone is what keeps us all within the bounds of ordinance.

William James makes this remark in his discussion of habit in The Principles of Psychology (1890), where he treats habit not only as an individual psychological mechanism but as a social force. Writing at a moment when psychology was being established as an empirical discipline, James emphasizes how repeated actions become automatic, conserving attention and effort. In the same vein, he argues that societies rely on entrenched routines—customs, manners, and institutional practices—to stabilize conduct and reduce the need for constant deliberation. The “flywheel” metaphor reflects late‑19th‑century industrial imagery, suggesting inertia and steadying momentum in both personal and collective life.

James frames habit as a stabilizing power: it preserves established patterns of behavior and keeps both individuals and communities from continual reinvention. Calling it society’s “flywheel” highlights how habit supplies inertia—once norms and routines are set in motion, they keep turning with minimal conscious input. This is “conservative” not necessarily in a political sense, but in the sense of conserving energy and maintaining order. The final clause—keeping us within “the bounds of ordinance”—suggests that much obedience to rules is not the product of constant moral reasoning but of ingrained practice. The passage also implies an ambivalence: habit protects social coherence, yet can also entrench rigidity and resist reform.