40 Maps that Explain the World

2. How humans spread across the world

7. How countries compare on economic inequality

9. Where the world's 30 million slaves live

10. Our globalized economy: What it takes to make nutella

11. Where populations are growing and shrinking

12. Walls of the world

The red lines indicate walls and barriers meant to prevent or control immigration; you see a number of those particularly where there are rich countries next to poorer countries.

The green walls are mostly political barriers, such as the 1,700-mile-long "Moroccan Wall" dividing Morocco-occupied Western Sahara, the West Bank separation barrier and the Korean demilitarized zone.

14. Who wins Nobel prizes (and who doesn't)

18. North America's languages, before colonialism

19. Where place names come from in

the Americas

24. The amazingly diverse languages of Africa

29. The word for "bear" in European languages

30. People who die trying to immigrate to Europe

35. Percentage of Indian homes with toilets

36. The languages of China and the surrounding area

39. The naval firepower in the Pacific

40. Every airline flight in the world over 24 hours

http://www.washingtonpost.com/blogs/worldviews/wp/2014/01/13/40-more-maps-that-explain-the-world/