GEOG 142 Lecture Notes - Lecture 2: Doubling Time, Reproductive Rights, British Agricultural Revolution
Document Summary
Global variation in population size and growth. Human beings have been around for at least 200k years. When resources are stressed due to pop growth, there needs to be an adjustment that then shapes future societal structures. Changes from hunter-gatherer period to the agrarian revolution. Declines amidst growth for empire collapse (3-5cs ad) and also for 14th c. plague. (which also included famines and global floods) The world"s population has exploded in size (population projection, source: un) There are high mortality rates around the viking age and roman period due to heavy warfare. There is low population growth until 1 c. ad. ~8000 bc, the world population growth was about 300 babies/year. Around the industrial age is when sanitation improved, which slightly heightened the pop growth rate. However, big improvements in pop growth occurred in 1940s with the improvement in medicine and vaccines (penicillin) It"s projected that global fertility rate will decline this century.
