The War On Drugs has not demonstrably curbed any appetites - but it has hyperinflated drug profits and channeled those profits into criminal and terrorist hands.
During my life time I've watched American society deteriorate at an increasing pace and the willing of a large segment of the population to drug themselves endlessly and the willingness of others to defend it is but one example of a widespread moral decline.
The so-called War on Drugs was/is an attempt to curb supply not appetites.