Tania Zittoun is Professor at the Institute of Psychology and Education at the University of Neuchâtel, Switzerland. She studies human development through the lifecourse, with a particular focus on how people make sense of, and create, their own trajectories. Alex Gillespie is Associate Professor in Social Psychology at the London School of Economics, UK. He studies social interaction, specifically how it produces novelty, creates our sense of self, and enables society to reproduce itself.