This week, Britain installed its seventh prime minister in barely a decade. France has churned through almost as many in just a few years. Its next president may well be the once-outcast Marine Le Pen. In Germany, the far-right AfD, tiny just a few years ago, now polls in first place. Even East Asian democracies — often viewed as stable, cautious, even boring — have seen governments in Japan, South Korea and Taiwan struggle in the midst of growing public anger. And where populists are in power, the situation doesn’t seem that different. Donald Trump now hovers near the lowest approval rating of any modern American president at this point in their term.