When the mountain breaks: Nepal’s disaster and the failure to act together

The Nepal disaster is not only a warning about a changing Himalaya. It exposes why societies fail to act on risks they already understand.

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Part of the difficulty is that human beings are not very good at understanding non-linear processes. We are comfortable with proportional stories. A little more warming should cause a little more melting; one more road should create one more manageable disturbance; another building near a river should add only one building’s worth of risk. Ecological systems do not always respond proportionately. Pressure accumulates quietly, feedbacks reinforce one another, and a system may absorb disturbance for years before crossing a threshold beyond which change becomes rapid and cascading. Non-linearity is the difference between a system that bends and one that breaks.

We should not convert this insight into a convenient causal slogan. It would be scientifically irresponsible to claim, before investigation, that a particular road, building or felled tree caused this collapse. Nor can every Himalayan disaster be attributed directly to climate change. Yet it would be equally irresponsible to ignore the changing background. Glacier mass loss in the Hindu Kush Himalaya was 65 per cent faster in 2011-2020 than in the previous decade, while retreating ice and thawing permafrost are altering slope stability. Climate change may not provide the immediate trigger in every case, but it is changing the physical system within which triggers operate.

Local development then determines how a hazard becomes a disaster. Roads cut into unstable slopes, construction pushed towards river corridors, poorly regulated extraction, tree loss and infrastructure placed in narrow valleys increase exposure and reduce ecological buffers. Nepal has known this for years. A World Bank assessment identified deforestation, road construction, water leakage and infrastructure failure among the activities that intensify flood and landslide risk. The central problem is therefore not a simple lack of information. It is the distance between knowledge and action, and between professed values and actual choices.

That distance persists because the choices producing risk are dispersed across many actors. A municipality that restricts construction may fear losing investment to another. A developer receives the immediate gain from building, while much of the downstream risk is shared by others. A household may protect its own plot but assume that the river, slope or forest is the government’s responsibility. Upstream and downstream communities often experience the same watershed as different political worlds. The fragmentation of decisions is not simply administrative. It produces a structure of incentives that makes dangerous outcomes more likely even when no single actor intends them. This is a classic collective-action failure: everyone fears that restraint will merely allow somebody else to benefit without changing their own behaviour.

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