It depends on what you mean by turn the country upside down. Considering the damage already done by alcohol and tobacco, I can't imagine the harm that would come from legal heroin, cocaine, meth, and marijuana.
Alcohol is the most dangerous one.
People need to be held accountable for their actions. That's it. Otherwise you end up punishing responsible users.
Legalization also means it's safer. People can be more open and get help under a doctors supervision without worrying about being criminalized.
Too much death and destruction has come from trying to fight against the drug market.
