I'll Have What She's Having explores how social learning shapes human behaviour, examining diverse examples from mate selection and economic decision-making to spreading ideas and cultural trends. The authors use social diffusion and cascade models to analyse these phenomena, highlighting the interplay between individual choices and social influence. They emphasize the significance of copying in driving cultural evolution and shaping collective behaviour, contrasting directed copying with undirected imitation to understand different adoption patterns. Ultimately, the work argues for a nuanced understanding of human behaviour that integrates individual agency and social dynamics' powerful effects.
