Here are his five reasons why marijuana should be legal (though to be fair, they can apply to all other illegal drugs as well):
1. The War on Drugs is prohibitively expensive.
2. Marijuana is less harmful than alcohol and tobacco.
3. Public opinion has never been better to facilitate national legalization.
4. We could generate a new source of tax revenue.
5. The War on Drugs has caused more human suffering than it has alleviated.