Common sense, lately bolstered by statistics, tells us that the death penalty will deter murder... People fear nothing more than death. Therefore, nothing will deter a criminal more than the fear of death... life in prison is less feared. Murderers clearly prefer it to execution -- otherwise, they would not try to be sentenced to life in prison instead of death... Therefore, a life sentence must be less deterrent than a death sentence. And we must execute murderers as long as it is merely possible that their execution protects citizens from future murder.