Hans Rosling explains the growth of 200 countries over 200 years and then explains the world of 7 billion using IKEA props.

Via TED:

The world’s population will grow to 9 billion over the next 50 years — and only by raising the living standards of the poorest can we check population growth. This is the paradoxical answer that Hans Rosling unveils at TED@Cannes using colorful new data display technology (you’ll see).