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LESSONS FROM DISASTER

15 crowd disasters.
15 lessons that save lives.

Every crowd tragedy was preventable — and each one taught the world something. Walk the path, learn what went wrong, and understand the principle behind it. Free, and it takes minutes.

The one number that decides everything: people per m²

Crowd crushes kill by compressive asphyxia — not trampling. It comes down to density.

1–2
Free movement
3–4
Comfortable
5
Danger begins
6–7
Can't move
9–10
Asphyxiation
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These lessons are free, and always will be — shared so fewer of these tragedies happen again. If a verifiable certificate would help your work, you can get one here.