Using simple economic reasoning, this book analyzes a broad range of global challenges including global warming, ozone shield depletion, acid rain, nuclear waste disposal, revolution dispersion, international terrorism, disease eradication, population growth, tropical deforestation, and peacemaking. These challenges are put into perspective in terms of scientific, economic, and political considerations. Many of these contingencies are shown to be solvable or reduceable without much explicit coordination among nations. Although there is no single panacea for these challenges, much can be done to tailor solutions. This book is intended for a wide audience drawn from the social sciences, including economics, environmental studies, political science, sociology, and public policy. It should also interest the general reader who wants to learn about global challenges.