May 2010, markets around the world began dropping due partly to problems in Greece and the Eurozone. "Roubini believes Greece will prove to be just the first of a series of countries standing on the brink," wrote the Telegraph. Roubini spoke about the new issues he felt governments must deal with: “We have to start to worry about the solvency of governments. What is happening today in Greece is the tip of the iceberg of rising sovereign debt problems in the eurozone, in the UK, in Japan and in the US. This ... is going to be the next issue in the global financial crisis. Roubini met officials in China during spring 2009, and said that many Chinese commentators blamed American "overborrowing and excess" for dragging them into a recession. However, he said that "even they realize that the very excess of American demand has created a market for Chinese exports." He added that although Chinese leaders "would love to be less dependent on American customers and hate having so many of their nation's foreign assets tied up in U.S. dollars," they're now "more worried about keeping Chinese exporters in business. ... I don't think even the Chinese authorities have fully internalized the contradictions of their position." 2011-12 Roubini and political scientist Ian Bremmer described the 21st century world as fragmenting economically and politically, where the "old models of understanding global dynamics are struggling" to keep up with rapid changes. In an article in Foreign Affairs magazine, they described what they called a "G-Zero world," where the United States no longer has the resources to continue as the primary provider of global public goods. As a result, they said there was likely to be more conflict than cooperation between countries, creating a "zero-sum game," a "game in which my win is your loss." They wrote: <blockquote>Europe is fully occupied for the moment with saving the eurozone. Japan is likewise tied down with complex political and economic problems at home. None of these powers' governments has the time, resources, or domestic political capital needed for a new bout of international heavy lifting. Meanwhile, there are no credible answers to transnational challenges without the direct involvement of emerging powers such as Brazil, China, and India. Yet these countries are far too focused on domestic development to welcome the burdens that come with new responsibilities abroad.<ref>Bennington, Ash. "Nouriel Roubini on the Origins of