A crash course in changing the world.
My favorite secret was that innovation comes from constraint because people in rich countris like the U.S. are used to eatings 3 meals a day. While people in Africa live of $2 a day. If you eat 3 meals a day and suddenly you are living on $2 then you would die because your not used to it. If you don't have that many resources then you make the best out of it.