Are Great Leaders Truly Great—or Just Lucky?
Historian Jared Diamond's "Hamlet test" — whether a different leader could have produced the same outcome — suggests business observers and boards routinely overstate individual CEO impact relative to timing, industry conditions, and luck, with direct implications for how boards weigh CEO-replacement decisions.
Summary
Historian Jared Diamond (author of 'Profits, Prophets, Coaches, and Kings: (When) Do Leaders Matter?') argues that popular narratives overcredit CEOs for outcomes substantially driven by timing, circumstance, and industry conditions. Using cross-domain 'natural experiments' spanning business, politics, sports, and religious leadership, he splits company profit variance into calendar-year (~2%), industry, individual-company, and CEO effects — with the CEO accounting for only 15-30% on average. His 'Hamlet test' asks whether a different, comparably qualified person could have produced the same outcome: Shakespeare passes (no other Elizabethan playwright wrote Hamlet), but Bezos doesn't (he shaped Amazon's method, not whether online retail happened). He identifies five conditions under which leaders matter most — rare unique qualification, recognizing a fleeting moment, acting on it, absence of substitutes, and compelling reluctant followers — illustrated via the Resnicks' pomegranate-juice monopoly, Bill Gates's 1976 microcomputer timing, Genghis Khan's unearned climate luck, and Churchill's wartime-not-peacetime fit. The direct implication for boards: replacing a struggling CEO often reflects random variation, not a fixable leadership deficiency.
Editor's opinion
The 'great leaders vs. circumstance' debate is centuries old, but Diamond's contribution is putting a number on it: splitting company profit variance into calendar year (~2%), industry, company, and CEO effects, with the CEO accounting for only 15-30% on average — a genuinely testable anchor for a debate usually fought with anecdotes. The Hamlet test (would someone else have produced the same outcome — Shakespeare passes, Bezos doesn't) is a clean, teachable heuristic boards could actually use before a CEO-replacement decision, more than a philosophical point.
Key concepts
Hamlet test · leader-attribution bias · CEO succession