The world has seen a dramatic fall in absolute poverty in the last 30 years or so. In 1990, more than one-third of the world's population was below the absolute poverty line; by 2015, it was 10% and falling. The raw number of people below the absolute poverty line declined by more than 1 billion. This extraordinarily rapid rise in the economic well-being of the world's poorest is without historical precedent.
A breakdown of the data by region shows an unsurprising pattern. Poverty in the east Asian region has dropped dramatically, thanks in substantial part to economic growth in China. Poverty in the south Asian region has dropped dramatically, thanks in substantial part to growth in India, as well as Bangladesh and others. Poverty rates in sub-Saharan Africa remain high.
But poverty rates don't quite capture the entire story. Population levels are very high in China and India, so that even low rates of poverty in those countries implies large absolute numbers of poor. Indeed, one pattern that has emerged is that in absolute numbers, more of the world's absolute poor now live in middle-income countries (which includes China, India, Pakistan, Bangladesh, Indonesia and others) than in low-income countries.
The report includes chapters looking at other measures of need, like improving the economic status of the bottom 40% of the population, or a multidimensional measure of poverty that includes not just income but access to health care and a secure community, or measures of poverty focused especially on women and children.