Several climate activists have lamented that by writing and starring in the documentary An Inconvenient Truth, Al Gore may have done the movement more harm than good, because as former Democratic vice-president and presidential nominee he stamped climate change with a left-wing seal. […] Recruiting conservative and libertarian commentators who have been convinced by the evidence and are willing to share their concern would be more effective than recruiting more scientists to speak more slowly and more loudly.

Steven Pinker, Enlightenment now: the case for reason, science, humanism, and progress, New York, 2018, p. 382