Science: Man's Hope

"How large," asks Dr. Harrison Brown, "can the human population become? To what extent, if any, does man still possess the power to determine his destiny?"

Many books by neo-Malthusian prophets of doom have attempted to answer these questions. Most of them have been superficial, emphasizing minor and easily corrected threats to man's food supply, such as erosion of farmlands. Others have ignored the enormous possibilities of man's scientific techniques. Brown's The Challenge of Man's Future (Viking Press; $3-75) is in a different class. Geochemist Brown of CalTech is thoroughly at home in...

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