The Straight Line Instinct

Question 1

How many people were there in 8000 BC?
When did the population reach 1 billion?
When did we reach 1.5 billion?
When did we reach 2 billion?
Where are we in 2018?
Where will we be in 2100?

Answer 1

<500 million
1800
1900
1930
7.4 billion
11 billion (But stable, just replacement fertility)

Question 2

Over the last 50 years, how has the average number of babies born per woman changed?

Answer 2

It has halved (5 down to 2.5)

Question 3

How do we curb population growth?

Answer 3

Eradicate extreme poverty (Higher income societies produce less children)

Question 4

What is the average birth rate in level 1 income societies?

Answer 4

5 children per woman

Question 5

What is the average birth rate in level 2-4 income societies?

Answer 5

2 children per woman