A brutal heat wave in Europe has caused a surge in deaths across the continent as temperatures topped 100 degrees in recent weeks. In France, authorities reported at least 2,000 additional deaths in a single week. Germany has reported more than 5,000 excess deaths this year.

But even as mortality spikes, Europeans continue to resist the one technology that could save their lives: air conditioning.

Air conditioning is one of modern civilization’s most important yet underappreciated inventions. One study from the National Bureau of Economic Research estimated that the spread of air conditioning in the United States led to a roughly 75 percent decline in heat-related deaths during the 20th century. But policymakers in Europe have discouraged this technology through taxes, regulations and a stubborn refusal to admit its benefits.

…