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If Scott Thurman’s The Revisionaries is to be believed, the culture wars will not be won on the editorial pages or cable news networks, but behind the closed doors of a tedious Texas committee meeting. This dry, often infuriating documentary follows the passionate battle that erupts when the Texas Board of Education reviews its educational standards, a process that helps shape the national agenda in public schools due to the state’s outsized influence in the world of textbook publishing. The story largely revolves around the tongue-tied Don McLeroy—a dentist and also the board’s chairman—who believes in the politicization of education and passionately derides the opinions of “experts.” It’s easy to get caught up in the righteous indignation The Revisionaries trades in, but the film does a poor job explaining what exactly is at stake; by the time its 90 minutes are up, you’re no better informed than you’d be if you’d attended one of the bureaucratic snipe sessions from which the film draws much of its running time.