Response to: Rethinking Human Development and the Shared Intentionality Hypothesis

I respond to Moll, Nichols, and Mackey’s review of my book Becoming Human. I agree with many of their points, but have my own point of view on some others.

Carrying, caring, and conversing

Social and ecological research and theory are used to elaborate and enrich two important sets of accounts of language origins. One is the interdependence and shared intentionality hypothesis (e.g., Tomasello, 2014a) of the ways in which humans became cooperative and conforming in ways that other apes did not, eventually leading to language. A second set of accounts addresses the emergence of bipedalism and its connections to language and to many other anatomical, cognitive, and social features that are distinctive in humans. Particular attention is given to the carrying and caretaking of infants. Research and theory challenging common assumptions about the role of conformity in cooperation and conversation are reviewed and integrated into these accounts. Together these varying perspectives point toward a more dialogical, dynamic, and distributed understanding of social interactions and the values that motivate and constrain humans’ social and linguistic skills.

Joint Intentionality

According to the shared intentionality hypothesis proposed by Michael Tomasello, two cognitive upgrades – joint and collective intentionality, respectively – make human thinking unique. Joint intentionality, in particular, is a mindset supposed to account for our early, species-specific capacity to participate in collaborative activities involving two (or a few) agents. In order to elucidate such activities and their proximate cognitive-motivational mechanism, Tomasello draws on philosophical accounts of shared intentionality. I argue that his deference to such cognitively demanding accounts of shared intentional activities is problematic if his theoretical ambition is in part to show that and how early (prelinguistic and precultural) capacities for joint action contribute to the development of higher cognitive capacities.