Digital technology, and AI in particular, is getting a lot of hype at the moment. Daron Acemoglu thinks that unchecked techno-optimism is concentrating power in the hands of a super-wealthy elite, threatening the livelihoods of the rest of us, and undermining democracy. Tim Phillips talks to him about why he wrote his new book called Power and Progress, co-authored with Simon Johnson, how we can redirect the path of innovation, and why he signed that letter to urge a pause in AI innovation.