Drug substances are one of the single most culprits of death and crime in our world. This is why we must have a War on drugs, because it will curtail much violence and other related criminal activity. It will also prevent death and illness caused by drug related illness and disorders.
The war on drugs is an abysmal failure that needs to be put to rest. It doesn't work, and the prison system is now crowded with non-violent offenders. Going after alcohol and tobacco would be just as much of a failure. People are going to drink and smoke. The only way to make them stop is to educate them.