The Drug War is not winnable, because its leaders attempt to ignore the inescapable facts of supply and demand. There is demand for drugs, legal or not. Making them illegal merely creates a black market, which increases crime. The answer is to remove drug laws, but that's only a partial answer. The next part is education. Raising people's awareness as to what drugs can do is critical. Drug problems should be treated as medical problems, not criminal ones. Certainly children should be shielded from indiscriminate drug use, but that's the job of parents, not governments.
Before the "Food and Drug Act" passed in 1906 in the United States anyone of age could walk into a drugstore and get whatever they required, including cocaine, without a doctor's note. The discussion occured between the consumer and pharmacist, who could advise about the pros and cons of particular drugs.
The United States engaged in the horrible "social experiment" of prohibition in the 1920's. We should have learned our lesson then.
Is there a correlation between repressive drug laws and widespread drug abuse? Conversely, where there are no drug laws, are there few drug abuses?