The most interesting part of a George Soros treatise on the EU crisis is its brief preamble in which the author says the world has changed since he penned the essay. Merkel's siding with Draghi over the Bundesbank's Weidmann on the subject of bond purchases was a "game-changing event," writes Soros. Taking full advantage, Draghi has "promised unlimited purchases" of troubled nations' sovereign debt. "The continued survival of the euro is assured."