Nobel laureate Kahneman's magnum opus: the two-system model of human cognition. System 1 is fast, intuitive, and emotional. System 2 is slow, deliberate, and logical. Kahneman maps the systematic errors in judgment — anchoring, loss aversion, overconfidence — with devastating precision. The most cited psychology book of the 21st century, and the intellectual foundation of behavioral finance.

The case for it, the case against, and the rest of the canon open with Pro.