With both China and India having just announced major plans to curb their carbon emissions, the sound you hear is a tipping point tipping. Heading into the United Nations climate summit meeting in Paris in December, all the world’s largest industrial economies are now taking climate change more seriously. This includes the United States — except for some of the knuckleheads running to be our next president, which is not a small problem.

When, at CNN’s G.O.P. presidential debate, the moderator Jake Tapper read statements from Ronald Reagan’s secretary of state George Shultz (who drives an electric car powered by solar panels on his home’s roof) about how Reagan urged industry to proactively address ozone depletion, and why Shultz believes we should be just as proactive today in dealing with climate change, he got the usual know-nothing responses.

Senator Marco Rubio said, “We’re not going to destroy our economy the way the left-wing government that we are under now wants to do,” while Gov. Chris Christie opined of Shultz, “Listen, everybody makes a mistake every once in a while.”

They sure do, and it’s not Shultz, who has been wisely and courageously telling Republicans that the conservative thing to do now is to take out some insurance against climate change, because if it really gets rocking the results could be “catastrophic.” Hurricane Sandy — likely amplified by warmer ocean waters — caused over $36 billion in damage to Christie’s own state, New Jersey, in 2012.