Actor-network theory (ANT) is a methodology developed in the 1980s by scholars working primarily in the sociology of science and technology. It is a novel approach as it attempts to redefine actors not so much as willful or intentional agents but instead as any entity—human or nonhuman—that in some way influences or perturbs the activity of a techno-social system. Most effective when examining limited systems such as ship navigation, electrical network failures, and the like, ANT resists large generalizations and categories, including the very notion of the “social” which, according to actor-network theorists, is never an explanation but instead is that which must be explained. Well into the 21st century, practitioners have both embraced and critiqued ANT, but it remains a useful form of inquiry.