One reason that Vladimir Putin invaded Ukraine was a sense of immunity against reprisal due to external dependence on Russia’s energy supplies and food. He was wrong about the reprisal calculation but not about dependence. The OECD’s Composite of leading indicators (CLIs) point to economic growth losing momentum in Europe. Nationalists fault global interdependence and globalists argue that resilience would be worse without interdependence. Robert Armstrong and Ethan Wu at the Financial Times point to deeper structural hurdles in Europe. According to the OECD, Europeans are substantially more dependent on government pension transfers than are Americans. In fact, Pew Research found that most U.S. households have some level of inv...