The author of Guns, Germs and Steel falters in this flawed study of whether individuals really make a difference Early in this book, Jared Diamond proudly introduces “what I term ‘the Hamlet test’”, which helps decide whether prominent individuals really make a difference, or whether others might...

Source: [Guardian International](https://www.theguardian.com/books/2026/sep/02/profits-prophets-coaches-and-kings-by-jared-diamond-review-how-to-change-the-course-of-history)

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