The perception that a city is “too dense” is usually a reaction to crowding, not density. Crowding is the lived experience of limited personal space and constrained movement.

People adapt to higher crowding over time, but adaptation has a ceiling. Someone raised in Delhi will tolerate tighter conditions than someone from a mid-sized American city, but neither will tolerate conditions beyond a certain threshold indefinitely. That threshold is rooted in basic bodily tolerance. At around 1 person per square meter — the density of a moving sidewalk crowd — you can extend your arms without touching anyone. At 2–3 persons per square meter, you’re on a busy platform: you brush people as you pass and adjust your path constantly. At 4–5, you’re in a packed subway car: elbows in, shuffling, close enough to feel body heat. Above 6, you’ve lost independent movement — this is concert pit density, stadium exit crush, the point at which crowds become dangerous. The critical threshold for sustained urban life sits at the lower end of this scale: most people begin to find conditions wearing when 2–3 persons per square meter is the baseline — not a peak, not a commute, but the ordinary texture of streets, markets, and transit across the day.

New York is dense, but its crowding is localized — concentrated in specific corridors, at specific times. The discomfort is episodic. In the densest parts of Asia, crowding at 2–3 persons per square meter is more spatially continuous: it appears across street types, transit systems, markets, and residential blocks, and it persists through more of the day.