How to green the world's deserts and reverse climate change | Allan Savory
Are China and the US doomed to conflict? | Kevin Rudd
This is what happens when you reply to spam email | James Veitch
Germany: Low Crime, Clean Prisons, Lessons for America | Jeff Rosen | TEDxMountainViewHighSchool
The history of our world in 18 minutes | David Christian
Why Brexit happened -- and what to do next | Alexander Betts
Where in the world is it easiest to get rich? | Harald Eia | TEDxOslo
The future we're building -- and boring | Elon Musk