Summarizes the theory that as human cultures evolve, they will, unless destroyed by some prior event, ultimately destroy themselves by exhausting their essential resources, by damaging their ecology until it will not sustain them, or both." (Author/AL)

Argues that perfected technology, not neo-Ludite response, is necessary for solution of world food and resource problems. Although energy supply will ultimately limit available food, reactors can supply sufficient power for 15 billion population. (AL)