“How large was mankind’s sense of obligation? The caveman first had this feeling for his mate, then for his family. It grew until men fought and died for the abstract ideas of cities and nations, then for whole planets. Would the time ever come when men might realize that the obligation should be to the largest and most encompassing reality of all—mankind? And beyond that to life of all kinds.”

Source: Planet of the Damned (1962), Chapter 18

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Harry Harrison 30
American science fiction author 1925–2012

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