I'm not real good with logs and exponential growth, but their chart claims that the population of the world went from 2 in 50,000 BC to 5,000,000 by 8,000 BC,
Fair enough (adam and eve are postulated for mathematical calculations, I guess), but then they go on to assert that over 1 billion people lived and died during that 42,000 year period. L I'm pretty sure that archeologists would object to that claim. Then go on to claim that 300,000,000 were living by 1 AD. They then assert that 46 BILLION people had lived and died between 8000 BC and 1 AD. Ummm... 46 billion/8000 = 5,750,000 So basically, they're saying that over 5 million people a year died during a period that started with 5,000,000 and ended with 300,000,000. Hmmmm.... You DO see that their calculations are a bit off, right? L ---In [email protected], <[email protected]> wrote : ---In [email protected], <LEnglish5@...> wrote : Your figures are waaaay off, as you assume steady growth. The point of that saying about "more people alive today..." was to point out that human beings were reproducing faster than ever before: They aren't my figures. It all comes from data collected by the Population Reference Bureau. Any graph of the population from 3 million BC until now that could be drawn in a normal computer monitor would show that the word's population was essentially zero (10 million) until the advent of agriculture many thousands of years ago and then grew rapidly so that by 1 AD, it reached 300 million. Between 1 AD and 1800 AD, population tripled. Between 1800 and 2015, the population has gone up 7-fold. So for most of our existence, there less than 10 million people or less alive at any given time. So the graph wouldn't even show a blip until 12,000 BCE and then grow 30-fold in the next 12,000 years. and then 3-fold in the next 1800 years. and then 1.6x in the next hundred years and than 4 fold in the past 100 years. The pace has leveled off from the estimated high of 2% growth per year in 1960, however. Yup, their chart shows that clearly, perhaps you are forgetting to add the total number of generations per given time? This multiplies each figure for a century many fold. They go into it in more detail here: How Many People Have Ever Lived on Earth? http://www.prb.org/Publications/Articles/2002/HowManyPeopleHaveEverLivedonEarth.aspx How Many People Have Ever Lived on Earth? http://www.prb.org/Publications/Articles/2002/HowManyPeopleHaveEverLivedonEarth.aspx How many people have ever lived on Earth? PRB's estimate is about 108 billion people. View on www.prb.org http://www.prb.org/Publications/Articles/2002/HowManyPeopleHaveEverLivedonEarth.aspx Preview by Yahoo L ---In [email protected], <[email protected]> wrote : It was written during the 1970s that 75% of the people who had ever been born were alive at that moment. This was grossly false. Assuming that we start counting from about 50,000 B.C., the time when modern Homo sapiens appeared on the earth (and not from 700,000 B.C. when the ancestors of Homo sapiens appeared, or several million years ago when hominids were present), taking into account that all population data are a rough estimate, and assuming a constant growth rate applied to each period up to modern times, it has been estimated http://www.prb.org/Articles/2002/HowManyPeopleHaveEverLivedonEarth.aspx that a total of approximately 106 billion people have been born since the dawn of the human species, making the population currently alive roughly 6% of all people who have ever lived on planet Earth. World Population Clock: 7 Billion People (2015) - Worldometers http://www.worldometers.info/world-population/ http://www.worldometers.info/world-population/ World Population Clock: 7 Billion People (2015) - Worl... http://www.worldometers.info/world-population/ How many people are there in the world? World population has reached 7 billion. World population live counter with data sheets, graphs, maps, and census data... View on www.worldometers.info http://www.worldometers.info/world-population/ Preview by Yahoo
