Time has its "Person of the Year." Amazon has its books of the year. Pretty Much Amazing has its mixtapes of the year. Buzzfeed has its insane-stories-from-Florida of the year. And Wonkblog, of course, has its graphs of the year. For 2013, we asked some of the year's most interesting, important and influential thinkers to name their favorite graph of the year — and why they chose it. Here's Emmanuel Saez and Thomas Piketty's:

This chart shows the top 10 percent's share of income from 1917 to 2012. It is striking because 2012 (latest year available) is indeed the very highest over the century.

Emmanuel Saez and Thomas Piketty are professors of economics at UC Berkeley and the Paris School of Economics, respectively. You can see their latest research on inequality here.