CHANGING GLOBAL POPULATION DYNAMICS
Historically human beings transformed themselves from nomadic community to settled life primarily on the river banks and started to cultivate land. Later handicrafts and barter system evolved, and cities and countries gradually developed. After settled life and cities came into existence population not only spread to different countries and continents but also started to multiply across the globe spanning in decades and centuries. Technically speaking growth of population depends on birth rate, death rate, fertility rate and migration. While birth rates are measured through the live births of babies born yearly per 1000 people in a population, death rates are measured through yearly deaths per 1000 population. Total fertility rate of a population is the average number of children that would be born to females over their life time.On the other hand migration both within the country and across countries are determined by both push forces lik...