I've heard for over a decade that when the Soviet Union fell that the communists migrated into the environmentalist movement. Maybe, and that would seem to be a relatively harmless place to keep them. Now with a grand attempt by environmentalists to wrest power from the industrialized nations via carbon taxes, and proven fabrications in data regarding climate change, and Dr. Lovelock here also on the side of doing away with democracy, it doesn't seem like such a silly thing after all.
Mankind has waded through millennia of rule by bullies, mafia type kings, religiously ordained kings, generals into kings, pick your poison of absolutist tyrant, etc. to finally obtain a somewhat working democracy. 234 years ago there was only one democracy. Now there are over 170. It may not be the perfect government, but I suspect there is no perfect government when imperfect people are involved.
Given the alternatives we've seen in the 20th century, I'll stick with democracy or republics for a while. We haven't given them nearly enough time to work the kinks out yet. Nothing else ever worked the kinks out either, even with hundreds or thousands of years to work things out. Communism is just subjugating yourself to another tyrant... the tyrantiest tyrant of a group of tyrants, just like it used to be.