Pie Graph/Chart: World's Largest Economies by GDP (PPP)

Using the same data as in the post below this one, here you have a comparison of all of the world's $500B+ economies, plus the aggregrate for the remaining 200 or so countries, whose total is roughly equal to that of the United States. The basic point here, which is that a few countries have most of the world's wealth and economic activity, is obvious but nevertheless stark.

Click the chart to enlarge: