This episode’s guest is Cathy O’Neil: mathematician, data scientist, and author of such works as Weapons of Math Destruction: How Big Data Increases Inequality and Threatens Democracy. Cathy talks with Richard about her past roles as a math professor, a quantitative analyst for a hedge fund, and a data scientist for a dot com startup. She explains how her experiences inform the writing that she’s doing now about the societal impact of technology and big data.