By the time you finish reading this article, the top 10 richest countries in the history of the world are all in the Americas, the Asia-Pacific region, and the rest of the global economy.Here’s how the top 20 nations stack up in terms of wealth.1.U.S. $21,621,731 2.Canada $17,856,957 3.Brazil $15,943,741 4.France $15.721,539 5.United Kingdom $15 …