IN ITS massive struggle for a greater share of the world's wealth, mankind's underprivileged majority is on a collision course with the most violent explosion of population in world history. Its path was charted in San Francisco by the University of California's Sociologist Kingsley Davis, who is also U.S. delegate to the U.N. Population Commission. Warned Davis: "Any discussion of future economic development which ignores population growth is fallacious."
The world's 2.7 billion population has almost doubled in the past 70 years, is expected to redouble every 42 years hereafter, and is rapidly approaching the level (top estimate: 7 billion) beyond which...