Technology continues to advance and so do our problems. Two of our biggest threats are global warming and nuclear war, and we must eliminate these threats. Fortunately, cost-effective technology exists to reduce global warming, but we must be smart enough to use it. The author offers a detailed proposal for combating climate change, building a more robust economy by creating jobs, eliminating oil imports, stabilizing energy prices, and cutting back on pollution and its detrimental effects on societyall by using clean, renewable energy. He also tackles reducing the threat of nuclear war, which will require us to tame the savageness of man. This must be done via international institutions, cooperation, and a commitment to shared values. Tackle two of the worlds greatest problemsglobal warming and the threat of nuclear warand consider how to address overpopulation, world hunger, and other problems along the way With Knowledge and Virtue.