‘I got sent down to big projects that had failed,’ Glennerster told me. ‘I went to Lake Turkana, up in the north of Kenya. The Turkana people are basically nomadic, and various development projects had hoped to improve their quality of life by settling them on the lake, so they built a big factory for fish. They managed to get them to settle and fish in the lake, but then the lake got overfished, and the fish stock collapsed … It was depressing.’ Disenchanted about the potential to have an impact in global development, she moved into domestic policy, taking a job at the British Treasury.