Hello Big Brains listeners! Our podcast is coming up on an important milestone … our 100th episode! As part of the month-long celebration, we’re looking back at some of our favorite episodes—highlighting a different world-changing idea or discovery each week.

This week, we look back at our episode with UChicago economist, Raghuram Rajan. He became infamous for predicting the 2008 financial collapse three years before it happened.

Rajan says that there are three pillars in our society: the state, the markets and the community. In his new book, he traces the history of how the state and markets have grown, while the community has weakened. He says these pillars need to be brought back to an equilibrium in order to address many of the global issues we face today.