No they don't. Every human being is an effing idiot when it comes to group dynamics and you never know when a simple brawl or mugging turns into murder. First

No they don't. Every human being is an effing idiot when it comes to group dynamics and you never know when a simple brawl or mugging turns into murder. First of all, if we are talking law and regulations: You don't know all of them and they are constantly shifting. And let's not get into the details of local legislation whether you live in a union of 50 or like me 28 states. Secondly morals, those are learned first through your family then friends, school, maybe a religious community and later on experience as you master your life on your own. Or rather you learn from your mistakes or the mistakes others make. The Supreme Court was right to disallow life prison for minors and your 18th birthday shouldn't be the hard limit for that.