There used to be a website devoted to pointing out examples of world maps that didn’t bother to include New Zealand. If we did make it, we were tucked into the lower right corner, just past Australia. We’re used to being far away and forgotten. For a brief time, Jacinda Ardern put us on the map. Here was a young prime minister, elected in 2017 at just 37, with an Obama-grade 1,000-watt smile, who symbolized optimism and Kiwi values of fairness and hope. To progressive admirers around the world, she became a symbolic alternative to Donald Trump, proving that progressives...