The United States is drifting toward the interventionist policy mix behind Argentina’s economic decline just as Argentina is embracing the free-market playbook that powered America’s success. …After Juan Perón became president in 1946, Argentina…cowered behind protective tariffs, nationalized many industries, brought the central bank and the judiciary under presidential control and ran massive fiscal deficits. …He erected high tariffs…state-controlled commercial banks funneled cheap credit to favored industries. …Argentina’s fiscal and monetary populism — spending surges financed by the central bank printing money — produced chronically high, sometimes explosive, inflation and economic chaos.Image …Buenos Aires is now attempting a reversal. In December 2023, Argentines handed the libertarian economist Javier Milei the keys to…the Argentine White House. Since then, his government has reduced trade barriers, repealed price-setting controls, trimmed subsidies, started privatizing state-owned enterprises, cut government spending enough to log a surplus and brought monthly inflation down… Meanwhile, across the equator, the United States is flirting with Perón-style economics. Debt has soared from 60 percent of GDP before 2008 to roughly 120 percent today. …Washington’s tariff run-up echoes Argentina’s old protectionism. Equally worrying are President Donald Trump’s executive order to tighten White House control over the Federal Reserve — another parallel with Peronism. The recent Chips and Science Act and the Inflation Reduction Act, which shower tax credits and subsidies on favored sectors, are also concerning. …Argentina’s course correction deserves applause; America’s recent detours invite concern. In this Great Reversal, one nation is learning from history; the other is inching toward repeating it.