Nope no gateway drug - people that have addictive personalities are going to get addicted to drug of CHOICE - key word CHOICE, the age 21 is a great idea, does not work so well with alcohol or tobacco 18, but some standard needs to be there. It was only criminalized to help Dupont sell nylon rope anyway. Problem with studies are the people paying for the study get the result they want because they are paying for the result they want, then the whole repeat business thing.