Why is smoking pot illegal?

its probably because the gov. cant tax because you can grow it yourself and they make no prophet..im wondering the same too.. and too the person that said smoking pot kills ur brain cells and makes you retarded is a retard himself..it obviously runs in the family as his mother tried to drive high..ahaha..nobody said u should do that ...hell weed is safer than most of those prescription medications out there that cure one thing but have a 100 other side effects..and weed is pretty much impossible to overdose on...but as with anything else too much of anything is bad for you..