The Gateway Theory

The Gateway Theory of marijuana basically states that marijuana is a stepping stone for other drugs. Its the theory that you start with harmless marijuana and then decide you want something stronger and go on to a more harsher drug. But the fact is that marijuana is the most popular drug in the United States and heroin, cocaine, and LSD are less common drugs. Therefore people who use these harder less common drugs are likely to have tried marijuana. Most marijuana users never use any other illegal drug. In fact, for the large majority of people, marijuana is a terminus rather than a gateway drug. If Marijuana is a gateway to harder drugs then you could just as accurately say that water or milk are gateway drinks for more harsher drinks like whiskey or wine.