Abstract

Theories of music evolution rely on our understanding of what music is. Here, I argue that music is best conceptualized as an interactive technology, and propose a coevolutionary framework for its emergence. I present two basic models of attachment formation through behavioral alignment applicable to all forms of affiliative interaction and argue that the most critical distinguishing feature of music is entrained temporal coordination. Music's unique interactive strategy invites active participation and allows interactions to last longer, include more participants, and unify emotional states more effectively. Regarding its evolution, I propose that music, like language, evolved in a process of collective invention followed by genetic accommodation. I provide an outline of the initial evolutionary process which led to the emergence of music, centered on four key features: technology, shared intentionality, extended kinship, and multilevel society. Implications of this framework on music evolution, psychology, cross-species and cross-cultural research are discussed.