As for intentional social engineering, remember Al Gore wrote "Earth in the Balance", signed the Kyoto treaty and was in office for 8 years. Eight years is time enough to do a _lot_ of harm. Here is the net effect of our energy policies based on global warming on a treaty which was never ratified but which has been implement bit by bit by the department of energy, the EPA and other federal agencies:
...under the [Kyoto] treaty, while emerging economies are exempted, global warming hysteria will [has]:
1.Increase the cost of living, forcing U.S. consumers to pay more for electricity (40-50 percent in some parts of the country) and other consumer goods, since electricity costs are reflected in the production costs of almost all goods and services;
2.Reduce American wages each year by 5 percent to 10 percent;
3.Devastate strategic U.S. industries, such as the steel, aluminum, chemical, pulp and paper, coal and cement industries, which also includes many large employers;
4.Encourage energy-intensive U.S. industries to move out of the U.S. to exempted countries like Mexico and Indonesia -- to any country beyond the reach of America's environmental police -- causing the additional loss of tens of thousands of high-skilled, high-wage jobs.
http://www.annapolisinstitute.net/archives/commentary/pb1997331.html While China and India get a free pass.