Population growth and the multifarious forms of pollution: the human animal was overgrazing his range. The human animal had destroyed everything in s… - Robert Sheckley

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Population growth and the multifarious forms of pollution: the human animal was overgrazing his range. The human animal had destroyed everything in sight, killed off the other big animals, used up millions of years of deposits of fresh water, oil, coal, and minerals. Fragile ecosystems had been pushed to the limit, some of them beyond recovery. The death of the earth was undramatic, but it was happening, and fast. And the governments continued to squabble and defend their various economic, religious, and social doctrines. The wealth of nations large and small was bled into the continuing efforts to increase the size, ingenuity, and ferocity of the armed forces. The humans were killer ants, devoting all their time to breeding more powerful mandibles.
Something had to be done immediately to preserve and maintain the great interlocking global system of ecosystems that sustained all life upon the earth. Only by managing the entire earth as a single unit could the basis of life continue on beyond the next century or two.
But twentieth-century civilization was locked into its self-destructive groove. Nothing could be officially done until the various threats became much more threatening. But by the time that stage had been reached, it would probably be too late to do anything.