A ferment in the environmental movement, brewing for many years, has now bubbled up into the blogosphere. We are dipping our ladle in here to take a little taste of it, even though we are quite certain it is not done fermenting. Bill McKibben has been stirring the wort of whether social activism can save us for many years. In Eaarth: Making Life on a Tough New Planet, as in The End of Nature a quarter century earlier, he poignantly waffled, in elegant prose, between hope and despair. Since launching 350.org — “the first political action with a number for a name” — he has urged those of us with any remaining shred of hope for our children’s future, given what we now know about climate change, to step up and lay our lives on the line. Get arrested. Risk lengthy jail terms and even death to stop this atrocity. Do not go gentle into that good night.