When social media burst on the scene, many of us were in awe of its great potential. For the first ten years of Facebook, public reaction to this new form of communication was overwhelmingly positive, but now that we have a better understanding of how social media is shaping our world, there are growing calls for fundamental reform.

Should tech monopolies be cut down to size and broken apart? Or is a much more careful, nuanced approach needed from Congress?

MIT Management Professor Sinan Aral has spent two decades studying how social media changed American politics, the economy, and even our personal health. He is the author of the recent book, "The Hype Machine". As an entrepreneur and investor, he has a deep understanding of the perils and promise of social media. We publish extracts from his interview with the podcast, "Democracy Works".