Which greatest threat to economy stabilty Greece, Puerto Rico or Chinese stock market?

The world seems on edge, economy growth is no where to found. Easy money, low interest have made asset values go up, but real economy growth is no where to found. The policy makers are clueless but true is man can not control an economy, if they could the Soviet Union would be in business today. The economy does what wants no matter what policy makers do. Greece is produce of this believe that man can deal with economy and magic can founded to solve economics, which mean unlimited wants, but limited resources something the Greek people do not understand for believe in entitlement society and it's belief in a entitlement society that will put end to Western Civilization, henceforth, even though Greece has very small economy it poses a far greater threat to economy stability than Puerto Rico( although the entitlement society has also  brought Puerto Rico to it's knees) or Chinese stock market.