O'Reilly logo

Slicing Pizzas, Racing Turtles, and Further Adventures in Applied Mathematics by Robert B. Banks

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

15

How Many People Have Ever Lived?

In 1990 the population of the world was approximately 5.32 billion people. This is an increase of 844 million over the 1980 population, which was an increase of 755 million over the 1970 population, which was an increase of 671 million over the 1960 population,…, and so on.

Interesting, but perhaps we are going the wrong way in time. Who cares about the population of the past—the demography of yesterday? We want to know about the population of the future—the shape of things to come. Two comments: First, the best way to make forecasts, at least for the near future, is to base projections on past and present information. Second, in the next chapter we shall indeed examine the topic of the world's population ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required