Bridgewater:

This report is an examination of populism, the phenomenon—how it typically germinates, grows, and runs its course.
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 in the past, we created an index of the share of votes received by populist/anti-establishment parties or candidates in national elections, for all the major developed countries (covering the US, UK, Japan, Germany, France, Italy, and Spain) all the way back to 1900, weighting the countries by their population shares. We sought to identify parties/candidates who made attacking the political/corporate establishment their key political cause. Obviously, the exercise is inherently rough, so don’t squint too much at particular wiggles. But the broad trends are clear. Populism has surged in recent years and is currently at its highest level since the late 1930s (though the ideology of the populists today is much less extreme compared to the 1930s).