Professionalisation as capture 

From Naomi Klein’s This Changes Everything pg 203:

These are the tough tools with which the environmental movement won its greatest string of victories. But with that success came some rather significant changes. For a great many groups, the work of environmentalism stopped being about organizing protests and teach-ins and became about drafting laws, then suing corporations for violating them, as well as challenging governments for failing to enforce them. In rapid fashion, what had been a rabble of hippies became a movement of lawyers, lobbyists, and U.N. summit hoppers. As a result, many of these newly professional environmentalists came to pride themselves on being the ultimate insiders, able to wheel and deal across the political spectrum. And so long as the victories kept coming, their insider strategy seemed to be working.