Modern disciplines both reflect and perpetuate a basic dualism. The na
tural sciences deal with a 'material world', abstracted from human con
cerns, while the social sciences have, in their turn, constructed a wo
rld of 'agents' disconnected from material things. James Gibson's theo
ry of affordances was an attempt to counter this deep schism in modern
thought by emphasizing the material conditions of human activity. He
came to see that psychology, as traditionally conceived, was itself a
creation of dualistic thinking. Yet, Gibson failed to engage in a corr
esponding exploration of the sociality of the material. This paper exa
mines the reasons why Gibson retained a dualism of the natural and soc
io-cultural in his theory; points to some of the ways in which the con
cept of affordances should be socialized; and, finally, raises the que
stion: what would ecological psychology stand to lose if all affordanc
es were social?