The Greek people have now raised the stakes, and it's time for a broader look at the threat to the European project.
There are so many high-profile multinational negotiations under way at the moment. Iran, the US, Britain, France, Germany, Russia and China are haggling their way toward a deal on Iran's nuclear programme.
Russia, the EU and the US are battling over the future of Ukraine. Pacific Rim governments are facing down criticism at home to forge an enormous trade deal known as the Trans-Pacific Partnership.
For all these fights, it's easy to cast one side in the role of rogue, thief or unruly child. But if we want to understand these contests and forecast where they're headed, we must consider them from all points of view.
There is no better illustration than the continuing tug of war between Greece and its creditors.
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