Evolutionary theory and social diversity are essential for understanding the developmental origins of human social cognition and attachment.

Bard et al. rightly call out Western-centric bias to champion Worldwide, in-Situ, Local and Diverse developmental research. Yet this inclusivity must be grounded in evolutionary theory to model development. Comparative evidence strengthens accounts of shared intentionality and attachment. Integrating within-species variation through WILD with between-species variation engaging evolutionary perspectives will offer more robust explanations of universal and diverse developmental pathways.