Despite the consumer class growing worldwide, some countries are predicted to see a decline in the number of consumers over the next decade.
From someone born in the 19th century, in the midst of historic population growth, comes this vintage visualization showing world cities growing ever bigger.
To offer perspective on the population of U.S. states, this map compares them to countries that share similar population sizes.
Population projections from the UN suggest that there will be over 10 billion people by 2060, though other organizations disagree.
Population pyramids can show a country's demographic advantages and challenges at a glance. See how different parts of the world stack up.