MYSTERIOUS: Global inequality at lowest level in nearly 150 years - You Need To See This

This century has known a stunning decrease in global income inequality, bringing it down to levels not seen in well over a century. That's the conclusion that Branko Milanovic, one of the world's foremost inequality researchers, comes to in an important essay for Foreign Affairs.

Why it matters: The U.S. has only about 4% of the world's population. Increasing equality is good for the planet as a whole, but it foreshadows an end to U.S. hegemony.