Theme .Theme:"Twelve Angry Men"is about on individual's ability to stand up for what he believes,even when others ridicule him.It is also a powerful study not just of the criminal justice system,but also of the diversity of human experience,the nature of peer pressure,and the difficulty of ever fully knowing the truth. The end of General Introduction. Theme The end of General Introduction. Theme: "Twelve Angry Men" is about on individual's ability to stand up for what he believes, even when others ridicule him. It is also a powerful study not just of the criminal justice system, but also of the diversity of human experience, the nature of peer pressure, and the difficulty of ever fully knowing the truth