Europe has been the source of unremitting gloom and doom for four years. The euro crisis has threatened the global economy. Most Americans, and many Europeans, have become exasperated with European nations' failure to respond decisively to their troubles.

So it is a refreshing — and brilliant — decision by U.S. President Barack Obama to visit Sweden and meet with Scandinavian prime ministers en route to this week's Group of 20 summit in Russia. Sweden escaped the crisis in its neighborhood, and it quickly restored steady and stable growth. It presents a proven model for the types of reforms needed in much of Europe and many other parts of the world, including the United States, and Obama should carry this success story to the full G-20.

Sweden was the world's third-richest country in 1968 but became a massive welfare state in the 1970s and 1980s and a prototype for how not to run an economy. It slid to No. 17 in the global income rankings and experienced a deep financial and real estate crisis in 1991, according to a 2012 study from the Research Institute of Industrial Economics. To its enormous credit, Sweden reversed course with consummate skill and political courage; it has become a paragon of sensible economic and social policy.