On a clear and seasonably cold Sunday morning in March, I made my way through the streets of an old neighborhood in Worcester, Massachusetts, and entered a large, converted brick building from some other century. Inside, in a cavernous room with worn floors and south-facing windows lit by the sun, a group of seventy or more young climate activists—mostly college students and recent graduates from the Boston area, along with a few veterans of the Occupy and global justice movements—were gathering for a full day and night of final preparations before carrying out a dramatic peaceful protest against the Keystone XL pipeline. The company building the pipeline, TransCanada Corporation, has its US Northeast office down the road in Westborough, and there, the next morning, twenty-five of these activists—accompanied by more…