Wealth is so unevenly distributed, that you need just $3,650 (less debts) to count yourself among the richest half of the world’s population. A mere $77,000 brings you among the wealthiest 10%. And just $798,000 puts you into the ranks of the 1%—within the reach of many white-collar urban professionals in the West. Hence, more than 35m people carry such a plump purse. Among the three billion adults at the bottom with less than $10,000 in wealth, 90% reside in developing countries. Yet 15% of millionaires live in developing countries too.