“Put another way, the chimpanzees' closest relative is not the gorilla but humans.”
The Third Chimpanzee (1991)
The Third Chimpanzee: The Evolution and Future of the Human Animal (1991)
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Jared Diamond 33
American scientist and author 1937Related quotes

Visions of Excess: Selected Writings 1927-1939
Washington Post Book World, review of King of the Mountain.

In response to: "If chimps are so much like us, why are they endangered while humans dominate the globe?" Discover Magazine interview with Virginia Morell (28 March 2007)

“Human beings are chimpanzees who get crazy drunk on power.”
Cold Turkey (2004)
Context: Human beings are chimpanzees who get crazy drunk on power. By saying that our leaders are power-drunk chimpanzees, am I in danger of wrecking the morale of our soldiers fighting and dying in the Middle East? Their morale, like so many bodies, is already shot to pieces. They are being treated, as I never was, like toys a rich kid got for Christmas.

In a letter written from Markree Castle, Sligo to his wife dated July 4th 1860. Charles Kingsley: His Letters and Memoirs https://archive.org/details/charleskingsleyh00kingiala/page/308 (1877)