He's been U.S. Treasury Secretary, a chief economist for the Obama White House and the World Bank, and president of Harvard. He's one of the most brilliant economists of his generation (and perhaps the most irascible). And he thinks the Trump Administration is wrong on just about everything.

We explore votes for English, Indonesian, and … Esperanto! The search for a common language goes back millennia, but so much still gets lost in translation. Will technology finally solve that?