First, the good news: The world has become considerably less poor. Today, 43 percent of people are considered to be living in poverty—that is, living on less than $2 per day—compared to 30 years ago when almost three-fourths of the developing world was doing so. Even more heartening is that extreme poverty—that is, living on less than $1.25 per day to meet the most basic human needs—has declined even more. In fact, the share of those living in this state has fallen by more than half, from 52 percent in 1981 to 22 percent in 2008.
Now, the bad news: Despite the substantial declines in global poverty, 2.5 billion people are still living in poverty (below the $2/day line), and 1.3 billion still are living in extreme poverty (below the $1.25/day line). What’s more, despite a reduction in international income inequality between countries, significant income disparities among citizens seems to remain unchanged on a global level, due in part to increased income disparities within newly emerging economies. But as long as poverty is falling around the world, should we even worry about income inequality?
Indeed, we should. Even if incomes are growing for everyone, persistent inequality should concern policy makers when perceptions of “unfairness” lead to political instability, when income inequality limits the potential for future growth and poverty reduction, and when inequality harms people’s opportunities and welfare.