Charles Perrow is famous worldwide for his ideas about normal accidents, the notion that multiple and unexpected failures--catastrophes waiting to happen--are built into our society's complex systems. In The Next Catastrophe, he offers crucial insights into how to make us safer, proposing a bold new way of thinking about disaster preparedness.

Perrow argues that rather than laying exclusive emphasis on protecting targets, we should reduce their size to minimize damage and diminish their attractiveness to terrorists. He focuses on three causes of disaster--natural,...