Populism is not well understood because, over the past several decades, it has been infrequent in emerging countries (e.g., Chávez’s Venezuela, Duterte’s Philippines, etc.) and virtually nonexistent in developed countries. It is one of those phenomena that comes along in a big way about once a lifetime—like pandemics, depressions, or wars. The last time that it existed as a major force in the world was in the 1930s, when most countries became populist. Over the last year, it has again emerged as a major force.
To help get a sense of how the level of populist support today compares to populism...