Just think of all the artists and poets through the years, who have used absinthe, or opiates. Or, how would greek history have formed with out the Oracle of Delphi getting high to see it's visions. Or the centuries of beer and wine. Would we have ever had a surrealist movement?
Would we have as rich of a cultural history if we didn't have these same substances that the governemnt tries so hard to control and deny people? If not, what does our governemnts continued restrictions mean for the cultural wealth of future generations?