At the beginning of Captain America: Civil War, Tony Stark is drowning in guilt. Confronted by a bereaved mother who lost a child in Sokovia—for which Stark is responsible, as the creator of Ultron—and flailing in the wake of a breakup with Pepper Potts, Stark is unmoored. Because he’s not good at self-regulating (see also: his addiction issues), he latches onto the proposed Sokovia Accords as a way to regulate the Avengers and hopefully prevent future Sokovias. Stark’s reasoning is understandable and even sympathetic. He is not a villain and he isn’t trying to take over the world, he just wants a framework to assume responsibility for sending the Avengers into the world to fight, thus removing that very responsibility from the Avengers’ shoulders.