The population is a group of humans living together in a given region at a given time of period. The changes in populations are termed dynamics of
population. A current human population is made up of all of the people who presently share the land.
The human populations are not stagnant. The population naturally changes in density, size and predomination of age groups in reaction to environmental components such as disease and resources availability, also as factors of cultural and social. The decreases and increases in human population size make up what is called dynamics of human population.
The human demography (the population change) is generally described in conditions of the deaths and births per a thousand people in the world. Once births of a region exceed deaths (ends), the increases of population. Once the births of a region are lesser than deaths measure, decreases in population.
While the population increased, the people began living in small town, and then in towns and finally in urban centre. It resulted to troubles associated with overcrowded terms and such as the progress of disease, wastes and poverty. Larger families were no more beneficial.
The pre-industrial stage, unpleasant living conditions result in a high death rate and a high birth rate. Population grows very slow, whenever in the least. Transitional stage commences shortly after industrial enterprise and during this phase, rate of death drops because of increased health condition, better sanitation and food production, simply, the rate of birth remains high level. Hence, rapidly grows the population.
The industrial stage, the industrialization is well established in the nation. The rate of birth drops and eventually approaches the rate of death. The couples in cities realize that youngsters are expensive to advance and that having large families restrict their job chances and the post-industrial level happens once the rate of birth declines still further to equal the rate of death, hence the population growth reaches 0. The rate of birth may finally fall below the rate of death, consequent in negative population development.
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