In the 20th century, the availability and low cost of oil triggered the industrial growth and development of the world's leading economies. Today, cheap, accessible oil supplies are dwindling, and the true cost to the world's environment of our profligate use of "black gold" is becoming clearer. America is embroiled in warfare and diplomacy to retain its hold on the Persian Gulf, the world's richest petroleum-producing region. In this new entry in...