Environmentalists love the precautionary principle. They invoke it in all policy discussions to avoid doing cost-benefit analyses. Here is an article that explains that in the catastrophic AGW discussion, the people favoring draconian measures to reduce CO2 emissions do not entertain the arguments of the potential harm of the policy. One of the worst outcomes would be the creation of a socialist global government. Of course, that is the goal of many of the warmists. Ilya Somin discuses this idea.