The world’s envoys just pledged to make the planet safer by reaching a pact to curtail hydrofluorocarbons (HFCs). HFCs are the fastest growing greenhouse gases. They are used in air conditioners, fridges and aerosols. Cutting HFCs will reduce global warming by 0.5 degrees by 2100. However, the transition from HFC to substitutes like ammonia, water or gasses called hydrofluoroolefins, ...

  When President Mauricio Macri took office in Argentina last December, he faced two monsters that his 44 million compatriots know only too well. The first was an economy ravaged by spendthrifts, who’d driven public finances into disarray and then papered over the mess with magical statistics. The second was the quandary of how to restore sensible government without inflicting ...

  Stanford historian Ian Morris is fond of saying that “each age gets the thought it needs.” According to this maxim, ideas like the Enlightenment, communism or even Christianity are a product of the economic and political circumstances of their times. It’s easy to believe that libertarianism might have been a good fit for the late 20th century. Coming out ...