Alcohol is a potentially addictive drug and if misused a substance that gives pleasure can lead to insidious but finally incapacitating illness. The reasons for alcohol being misused lie but only in the individual but in his society: if the environment is permissive toward excessive drinking, then excessive drinking

will go unchecked.

Anyway, no drug, not even alcohol, causes the fundamental ills of society. If we're looking for the source of our troubles, we shouldn't test people for drugs, we should test them for stupidity, ignorance, greed and love of power...