The Magic Bullet Theory proposes that media has a direct, powerful, and immediate influence on audiences similar to being shot with a bullet. It was developed in the 1930s-40s based on the role of media in World War propaganda campaigns. The theory suggests that audiences passively accept messages without rejection and can be manipulated en masse by media. However, the theory has been criticized for ignoring audience agency and failing to acknowledge more complex interpersonal influences on opinion formation. Later research also found the theory was not empirically supported.