Bob Bady, a founding member of the Safe and Green Campaign, has penned an op-ed at the Vermont Digger entitled "What Killed the Beast?"
The beast to which he refers is Vermont Yankee, a GE Mark I boiling  water reactor, identical in design to the wrecked, leaking Fukushima  Daiichi Units 1 to 4 in northeastern Japan.
He writes: "...The ultimate goal of a large corporation such as   Entergy is to make money. Its growth or demise is about profit. The   backstory is actually what prevented Vermont Yankee from making enough   profit to continue to operate for decades to come.
Certainly cheaper natural gas was a signficant factor, as was an old   plant that would require significant maintenance in the coming years.   Pending costly federally mandated safety improvements, precipitated by   the Fukushima disaster, also loomed.
The tipping point, however, the thing that might have really sealed Vermont Yankee's fate, was grassroots activism...".
He concludes that "because the anti nuke environmental community in   Vermont, southwestern New Hampshire and western Massachusetts worked   hard, long and intelligently to rally public opinion, and educate the   Vermont Legislature," state laws signed by Vermont's former, pro-nuclear   Republican governor became a "big expensive problem" for Entergy.
Bady adds "Entergy's income was first impacted when, by late 2010 and   early 2011, its reputation had become so damaged by its own misdeeds,   brought to the spotlight by activists, that Vermont electric utilities   played hardball in contract negotiations. As a result, no deal emerged   between Vermont Yankee and Vermont utilities, and Entergy was left to   sell its product on the "spot" market, where prices had dropped because   of cheaper natural gas."
Author Richard Watts asked the same question: how could Vermont   Yankee go from being seen as a good neighbor and mainstay of the Green   Mountain State's economy by some, to being almost universally disdained,   even by former supporters, as a pariah, with top elected officials   referring to Entergy publicly as a "rogue corporation"? Watts' book, Public Meltdown: The Story of Vermont Yankee, shows that Entergy's cover ups and lies under oath to state officials   -- such as the 2007 cooling tower collapse brought to light by   whistleblowers (photo, above left), and Entergy executives' perjury   regarding radioactivity leaks into groundwater -- combined with   widespread grassroots activism, turned the tide.