This special issue of Development in Practice is dedicated to Natalia Streuli Wilson (1976–2012), who sadly passed away prior to its publication following a brave struggle against cancer. Natalia conducted her doctoral fieldwork in a Young Lives site in Peru and worked with Young Lives from 2008 until her death; initially in Oxford, and more recently in Lima, she had taken on the role of a lead qualitative researcher for Peru. Natalia was a highly valued and committed member of the team whose contribution will have lasting effect on our research and policy engagement. A cherished friend, she is sorely missed by everyone.