Henry Sokolski has written an excellent, short book about what he sees as our not so peaceful nuclear future. While short in length, it covers a lot of ground, and because it is extensively footnoted, it can lead readers to the broader literature. The book provides a good picture of the growing stockpiles of separated plutonium and the stockpiles of highly enriched uranium, as well as the likely expansion of nuclear power programs in additional countries. When reading the book, my thoughts turned to the Per Bak book, How Nature Works, and the concept of self-organized criticality and its descriptions of computer simulations and experiments leading to avalanches in sandpiles. This may be a useful way of thinking about the possible consequences for nuclear weapon proliferation as the stockpiles of fi ssile material grow.