KERALA RISING · FROM EXPORTING PEOPLE TO EXPORTING IDEAS Kerala has closed this loop before, more than once, and each time the change was faster and more lasting than anyone expected. The S-curve, and why it usually stalls Population-scale behaviour change follows an Scurve, and the shape is worth holding in mind because the whole strategy is about its inflection point. A small early cohort adopts a new behaviour for reasons of identity, novelty, social proof, or reward. For a long stretch the curve looks flat: the cohort is small, the majority is unmoved, the behaviour looks marginal. Then visible imitation begins. The cohort grows. Rewards accrue to early adopters in ways others can see. Neighbourhoods, schools, and businesses begin to compete on the behaviour because there is now standing to be gained from it. At some point the curve inflects and the behaviour becomes the norm. The holdouts begin to stand out negatively. After that point the change is durable, because not doing the thing now carries social cost. The behaviour stops being heroic and becomes ordinary. Most civic campaigns die in the flat part of the curve. They produce a burst of early adopters; a clean-up drive, a planting day, a safety week, and then stall, because nothing converts the visible enthusiasm of the few into standing the many will compete for. The campaign was an event, not a loop. 48