What is Mr. Curtain's primary method for achieving his goals?

Mr. Curtain's primary method for achieving his goals is mind control. This is evident throughout the narrative, as he employs manipulative tactics and psychological strategies to exert influence over others. He utilizes technology and psychological manipulation to bend people to his will, directly impacting their thoughts and actions. This method not only allows him to maintain power but also serves as the major source of conflict within the story, especially in his opposition to the protagonists, who fight against his attempts to control society.

While the other choices suggest alternative forms of leadership or influence—such as teamwork, conventional techniques, or negotiation—they do not reflect Mr. Curtain's approach. His reliance on mind control highlights the themes of power and control present in the storyline, contrasting with the more collaborative and ethical approaches seen in the characters of the Mysterious Benedict Society. This distinction is crucial to understanding the overarching conflict and the stakes that the protagonists face in their quest to stop him.