  Enactivism is the view that cognition emerges from or is constituted by sensorimotor activity. Currently, there are three distinct strands of enactivism (Ward, Silverman, and Villalobos 2017). Autopoietic Enactivism conceives of cognition in terms of the biodynamics of living systems (Varela, Thompson, and Rosch 2017; Di Paolo 2005). Just as a bacterium is created and maintained by processes that span the organism and environment, so too is cognition generated and specified through operation of sensorimotor processes that crisscross the brain, body, and world. On this version of enactivism, there is no bright line between mental processes and non-mental biological processes. The former simply are an enriched version of the latter. Sensorimotor Enactivism is another strand of enactivism that focuses on explaining the intentionality and phenomenology of perceptual experiences in particular (O'Regan and Noë 2001; Noë 2004). This view holds that perception consists in active exploration of the environment, which establishes patterns of dependence between our movements, sensory states, and the world. Perceivers need not build and manipulate internal models of the external world. Instead, they need only skillfully exploit sensorimotor dependences that their exploratory activities reveal. Finally, Radical Enactivism aims to replace all representational explanations of cognition with embodied, interactive explanations (Hutto and Myin 2013; Chemero 2011). The primary tactic guiding Radical Enactivism is to deconstruct and eliminate the notion of mental content in cognitive science. This tactic manifests in critiques of attempts to naturalize intentionality, redescribing cognitive processes studied in mainstream cognitive science, and challenging concepts employed even by closely related views, such as Autopoietic Enactivism’s notion of sensemaking (Chemero 2016). These three strands of enactivism vary in their target explanations and methodology, however they share the commitment to the idea that cognition emerges from sensorimotor activity.