Affordances have been conceptualized by J. J. Gibson as what the environment offers, provides or furnishes the organism, in other words, as possibilities for action. However, this notion is not without controversy, in particular surrounding its nature and properties. This entry will consider the ways in which the concept of affordance can help us build a material theory of the possible, one that is intimately related to both subjective experience and to culture. The entry discusses different definitions of affordance, its types and characteristics, before outlining a model of the possible based on the interplay between materiality, intentionality, and normativity. The implications of this model for our understanding of agency and possibility are discussed in the end.