the demographic transition review

Today we went over the demographic transition packet some of the main points on the packet were- the stages of growth the stage one, stage two, stage three and stage four. Stage one is low growth, stage two is high growth, stage three is moderate growth, and stage four is low growth. Most of human history was spent in stage one but today no country is in stage one most are in stage two. A country moves from stage two to stage three when the CBR begins to drop rapidly, a society enters stage three when people have fewer children. A country reaches stage four when the CBR declines to a point where it reaches CDR and the NIR approaches zero.