7 billion
sastyk | October 20, 2011On the 31st of October we will officially reach 7 billion people on the earth. Over the next week or two we'll be talking a lot about population issues, and I wanted to start by doing a light revision of an article I wrote some years ago about a concept a lot of people don't grasp very well - the idea of demographic transition and what it means.
The term "Demographic Transition" describes the movement of human populations from higher initial birth rates to a stabilzed lower one, and seems to be a general feature of most societies over the last several hundred years.
Initially, birth rates…