> First, if we as society are going to lock them up forever, why not just save ourselves the expense and execute them all. Because locking someone up is revers

> First, if we as society are going to lock them up forever, why not just save ourselves the expense and execute them all. Because locking someone up is reversible. Your slippery slope argument is a logical fallacy in any case. Not all crimes have equal rates of damage or recidivism. There are many good reasons to differentiate between types of crimes and their motivations. Presumably you agree that we should probably lock up serial killers, right? According to your style of slippery-slope argument you have no way of distinguishing between that and executing children that won't go to bed on time, because it's all a continuum.