Wolfgang Lutz: World population and human capital in the twenty-first century

Demographers from the United Nations Population Division and several universities published a paper in Science last week that argues the world population is unlikely to stop growing this century. They calculate that there is an 80% probability that world population, now 7.2 billion, will increase to between 9.6 and 12.3 billion in 2100, with the median at 10.9 billion. Contrary to the UN projections, the IIASA medium (most likely) scenario indicates that world population will increase to 9.2 billion