Wednesday, 21 January 2015

world population in history

world human population  has been growing during all history in a sort of exponential way.
the general estimation for human growth in history can be found in wikipedia and other sources and it's commonly accepted as roughly real.

we know for example that in 2000 world population was about 6,000 millions people. and in the year 1 a.d. all humankind was between 250 and 300 millions of people.

that's the interesting part, because we can make a comparison between human history in other ages and the present population of some countries of the world new-a-day; 'cause in 2015 the population of Africa, Asia and Europe together sums 6,000 millions people (exactly as all the planet in the year 2000) and the population of Brazil now-a-day is the same of all human population in the year 1 a.d.

this can be an interesting perspective to understand how sparely inhabited could be our planet in different periods of history.

using some estimates from wikipedia I made this easy comparison:

shown in another way we can understand the same data through this graphics:

that's a quite interesting comparison, if you analyse it carefully: in the year 4000 before christ in all the surface of the planet there was only the population of hong kong presently!
it means that when the first kingdoms of Egypt were about to rise up in that region there couldn't be more people than in a part of a secondary district of Hong Kong now a day!
quite interesting, don't you think?
for sure they needed slaves from outside in order to build those huge massive pyramids all around! there weren't enough human beings in Egypt for such a big project!
there are very crazy things made up in honour of the gods during all history...

anyway here you have a geographical explanation of the same concept, year by year.

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