Impressive and educational. Kudos to you Cofty.
Regarding population growth, it's quite interesting to see that from the days of Jesus Christ to the 19th century there is very small growth. But it is in the 20th century when we have an unprecedented growth rate. I believed, it tripled in just a century (from the 1900's to the 2,000's). The reason is quite simple, we have learned to reduce significantly mortality due to disease and famine. This is precisely what makes the huge difference between the 20th century and any other time before.
Quite interesting how an elder last year in the Special Talk tried to convince the audience that the 20th century was the worst ever. Why? Because famine, wars, disease and earthquake had gotten worse!!!!! Unbelievable, completely the oppossite is true and a population graph can prove it beyond doubt.
Read the article. It confirms what I had learned before and wrote above.