When horrific acts of violence take place, events such as massacres in Boston, Newtown, CT, and Aurora, CO, people want answers. Who would commit such a thoughtless act of violence? What in their backgrounds could make them so inhumane, cruel, and evil? Often, people assume immediately that the perpetrator must have a mental disorder, and in some cases that does prove to be the case. But the assumption that most people with mental disorders are violent, prone to act out, and a threat to others and themselves, is clearly erroneous. Mental Disability, Violence, and Future Dangerousness...