The war against marijuana is more about what is good and beneficial to people and society about marijuana and protecting existing industries from competition than the health risks or damage to society from its use.
Consider hemp, which is one of the best feed stocks for biofuel or ethanol production. We could grow enough hemp to rival our petroleum production and it is carbon neutral. Hemp can also be used to make fabric for clothing and does not require the vast amount of chemicals used in cotton production. Over 50% of all agricultural chemicals, such as herbicides, pesticides and fertilizer are used in cotton production. Hemp can also be made into sulfur free charcoal to be used to fire coal-fired power plants, and again it is carbon neutral. It can be made into building materials such as sheathing to replace plywood and beams to replace lumber, saving our forests that actually capture carbon dioxide in the atmosphere. Henry Ford once made a car from hemp based plastic that was said to be stronger than steel when struck with a hammer and it ran on biofuel made from hemp. Hemp seeds contain all of the essential oils and nutrients that are necessary for human health and have been used as food for people and livestock for thousands of years. Hemp was so vital to the development of our nation that up until a hundred years ago we had laws mandating that farmers grow hemp and it was even legal tender for a time in our nations history.
As far as smoked marijuana or marijuana edibles, marijuana is one of the safest therapeutically active substances known to man. It has been found to be effective in treating pain, spasms associated with multiple sclerosis, wasting, post traumatic stress, cancer and more, yet our government steadfastly ignores all of this evidence, even though they hold a patent on marijuana that describes in detail how marijuana is efficacious in treating cancer. Could they be protecting the pharmaceutical industry? States that have legalized marijuana for medicinal use, have seen a 9% reduction in traffic fatalities. The study did not determine the reason for this drop in traffic fatalities but speculated that it may be because people may have been substituting marijuana for alcohol. If that turns out to be the case, recreational marijuana may have an even greater effect on reducing traffic fatalities. Marijuana is far safer for individuals and society, than alcohol or tobacco from a health viewpoint and does not have the strong association with violence that alcohol has.
Based on what is currently known about marijuana, the arguments our government uses to support marijuana prohibition are baseless and just plain wrong. The only thing that makes any sense to me is that our government is protecting certain businesses from competition or loss from legal marijuana and hemp. But then again, why would you expect anything else from the corrupt government we have that believes they are above the law, the Constitution and the will of the people?