Definition
The single perspective instinct is the habit of reaching for one favoured framework — markets, politics, biology, religion, technology — and using it to explain every problem you meet.
A single lens is comfortable. It compresses the world into a known shape, makes diagnosis fast, and supplies a ready-made solution. The cost is that most real problems have multiple causes and respond to multiple kinds of intervention. Treating every nail-shaped problem with a hammer leaves the screw-shaped ones unsolved.
Why it matters
How it works
The instinct shows up most strongly in people who have mastered one discipline. A skilled economist sees incentives in every problem; a skilled epidemiologist sees transmission and exposure; a skilled political theorist sees power. Each lens is genuinely useful — and each one, used alone, leaves systematic blind spots.
Rosling's corrective is a small toolbox rather than a single tool. When facing a complex issue, the practice is to run it through several lenses in turn — numbers and stories, individual incentives and system structure, short-run and long-run — and keep the parts that survive cross-examination. The aim is not relativism but triangulation.
The instinct interacts with the blame instinct and the urgency instinct in dangerous ways. A single lens supplies a single villain (the market, the state, foreign actors), and a single villain supplies a single urgent fix. Multi-perspective analysis tends to produce smaller, slower, more reversible interventions — which is usually the right answer when the problem is complex.