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World population estimates and History of the world Estimates of world population by their nature are an aspect of modernitypossible only since the Age of Discovery.
Early estimates for the population of the world  date to the 17th century: William Petty in estimated world population at million modern estimates ranging close to twice this number ; by the late 18th century, estimates ranged close to one billion consistent with modern estimates.
Classical demography and Medieval demography Estimates of the population of the world at the time agriculture emerged in around 10, BC have ranged between 1 million and 15 million.
By contrast, it is estimated that around 50—60 million people lived in the combined eastern and western Roman Empire in the 4th century AD.
China's population rose from approximately million in to million in and now stands at over 1. The population of the Indian subcontinentwhich was about million inincreased to million in ;  today, India, Pakistan and Bangladesh are collectively home to about 1.
Mexico's population grew from Methodology.
The analysis in this paper is supported by a model of trends in energy production. The model is based on historical data of actual energy production, connected to projections that are drawn from the thinking of various expert energy analysts as well as my own interpretation of future directions.
In demographics, the world population is the total number of humans currently living, and was estimated to have reached billion people as of November It took over , years of human history for the world's population to reach 1 billion; and only years more to reach 7 billion.. World population has experienced continuous growth since the end of the Great Famine of – A democracy is a political system with institutions that allows citizens to express their political preferences, has constraints on the power of the executive, and a guarantee of civil liberties.
Jun 01, · Outline the changing nature, rate and distribution of the world’s population. The world population is expected to grow from billion in to billion in , increasing therefore by 47 per cent.
Term Paper on Peace - Words; Demography and Bioethics - Words; Inflation and New Blackberry Phones;. THE TRAGEDY OF THE COMMON REVISITED by Beryl Crowe () reprinted in MANAGING THE COMMONS by Garrett Hardin and John Baden W.H.
Freeman, ; ISBN Since the world's population has risen from 2 billion to over 7 billion now. Food production and infrastructure is not keeping up, and the world's population explosion is still accelerating.