Daniel Kahneman, renowned psychologist and Nobel prize winner, dies at 90

Daniel Kahneman, an Israeli-American psychologist and Nobel laureate, has died aged 90. Photograph: Richard Saker/The Guardian

Daniel Kahneman, a psychologist who pioneered theories in behavioural economics that heavily influenced the discipline, and won him a Nobel prize, has died at age 90.

Kahneman, who wrote bestselling book Thinking, Fast and Slow, argued against the notion that people’s behaviour is rooted in a rational decision-making process – rather that it is often based on instinct.