It’s hard to give a concrete answer, but this morning Jack Dorsey retweeted an image which is pretty interesting and gives way to an answer:
Of the 7000 million people who live in this world, approximately 5000 million of them live within this circle. This makes for amazing diversity in languages, cultures, currencies and traditions. And while the rest of the world sinks in an economical recession, the countries in this cirlce have been growing their GDP’s by about 10% per year for some time now. Demographically, this is the center of the world, and economically it is about 5 years from being so. So who wants to see the world? I do!