Rethinking the “we” in “we” intentionality: intention-sharing with —and not simply about —things

This paper aims to place the general thesis for a species-unique "shared" or "we" intentionality, against the theoretical background of the material engagement approach. We will argue that the human ability to enact and share intentions rests upon a relational and participatory foundation of situated activity where intentional transactions between humans as well as between humans and things (in the broadest sense of material environment) are inseparable from the situational affordances of their engagement. Based on that, the paper advocates for an ecological-enactive account of shared intentionality which understands material engagement as central to the evolution and development of human social cognition.