"Energy is the go of things," as James Clerk Maxwell pointed out. This th simple truth was largely overlooked during the first 70 years of the 20 century, because in the industrial world most politicians, civil servants, and opinion makers were inclined to believe that virtually an infinite supply of reasonably priced energy would always be available, and so things would continue to 'go' in the manner to which many of their constituents and admirers had become accustomed. Similar opinions were held about fresh air, and water for consumption and agricultural uses. As a result, it was not until...