You Can (Not) Legislate Morality?

Where is the research suggesting that moral reason can be legislated? Behavior is obviously vulnerable. Unless someone is brainwashed to think a specific pattern, then the exercise of free thought processing and informaiton processing cannot be legislated. Under the heavy influence of cultural rewards and punishments, yes, the subject will begin to change his thinking to agree with the majority lest a shock treatment be sent his way. But under normal living experiences, thinking is sitll an internal process. Behavior can be legislated: don't smoke in publics places; don't DUI; don't spit on the sidewalk; -- all types of do's and don't can be consensually agreed upon as desireable behaviors. And, agreed, whose moral values/reasoning?