There are many ways to measure the wealth of a nation. Per capita wealth is just one way. The US has by far th largest GDP in the world. We were third in personal income a few years ago. But a Newsweek survey in 2010 ranked the US no. 11 in standard living and quality of live. Then there is a measure of net assets and most millionaires, etc, etc...... I would take most of these surveys with a grain of salt. I have no doubt that if US stopped being the policeman of the world and the most charitable nation on earth we would be number one across the board.