from Part I - Historical Background and Theoretical Foundations of Jay Belsky’s Work in Evolutionary Developmental Psychology
Published online by Cambridge University Press: 04 September 2025
The life history approach to individual differences has become a major influence in evolutionary psychology, not least thanks to the contributions made by Jay Belsky and his collaborators over the last three decades. Today the approach is at a turning point, with a lively dialectic between proponents and critics and a menu of theoretical and empirical challenges to address. In this chapter, I follow up on previous work and continue to critically examine the concepts and assumptions of the “fast-slow paradigm” in evolutionary psychology. Specifically, I try to clarify some aspects of the interplay between the demographic and psychological levels of analysis, make an updated case for the centrality of the mating–parenting tradeoff in the organization of life history-related traits, describe the constellations formed by those traits, introduce the notion of multiple fast/slow profiles, and (re)consider the role of puberty timing in relation to human life history strategies. Preserving the value of the life history approach demands that we work to keep the foundations healthy – constantly revising our concepts and assumptions, in the spirit of Jay’s remarkable scientific career.
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