Insanity is a legal term used to describe a person's inability to understand the nature of their actions due to severe mental illness. It often comes into play in criminal cases, where a defendant may be deemed not responsible for their actions if they were unable to distinguish right from wrong at the time of the offense. This concept is sometimes referred to as the M'Naghten Rule. In psychology, insanity is associated with various mental disorders, such as schizophrenia or bipolar disorder, which can significantly impair a person's thinking and behavior. Treatment for individuals deemed insane typically involves therapy and medication, aiming to stabilize their condition and help them reintegrate into society.