"There is nothing which I dread so much as a division of the republic into two great parties, each arranged under its leader, and concerting measures in opposition to each other. This, in my humble apprehension, it to be dreaded as the greatest political evil under our Constitution." óJohn Adams
Cigarettes definitely. Cigarettes are considerably more addictive than either alcohol or marijuana. They also harm others if you smoke in public. Alcohol is dangerous in large quantities, but there have been a lot of scientific studies that alcohol drunk in moderation is actually good for you. That's not true of cigarettes, there is nothing at all good about them. A single joint is worse for you than a single cigarette, but since marijuana isn't addictive like cigarettes are, people who smoke it tend to smoke far less.
So in short, of the choices you listed, cigarettes are the worst.
I would argue that the worst overall (at least in terms of the number of people it kills) is unhealthy food, which seems to be the vice of choice for most americans (myself included).
If you build a man a fire, he'll be warm for a day.
If you set a man on fire, he'll be warm for the rest of his life.
Marijuana, of course. The drug is a gateway to governments to flush billions of dollars down the toilet in vain attempts to stop slackers from eating taco bell.
Alcohol, wasn't Brezhnev drunk when he ordered the Soviet invasion of Afghanistan?
But I do think it is alcohol, it causes many more social problems than both cigarettes and pot.
"To waste, to destroy, our natural resources, to skin and exhaust the land instead of using it so as to increase its usefulness, will result in undermining in the days of our children the very prosperity which we ought by rights to hand down to them."~ Theodore Roosevelt (Message to Congress, Dec. 3, 1907)
tobacco is the most harmful vice to the users. Drinking to those around the user
They, in excess, are all "bad", probably Miami Vice is the worst.
In moderation - if only we could learn this- cigarettes are the worst as they stink, a most foul odor.
Alcohol, in moderation, is OK.
As some others say, the prohibition is far worse than its target.
Smoking by far, its easier to addicted to smokes than it is alcohol.
Jackboots always come in matched pairs, a left boot and a right boot.
No chemical has caused more human misery than alcohol. The reason is that it is ubiquitous, legal and socially acceptible, therefore it is the most commonly abused intoxicating substance.
Moderate consumption loosens inhibitions and impairs coordination and reaction time. Heavy consumption can lead to severe behavior alteration and actions the person would not dream of when sober.
Alcohol is involved in the majority of murders and fatal traffic accidents.
Fiddling While Rome Burns
Carthago Delenda Est
"I used to roll the dice; see the fear in my enemies' eyes... listen as the crowd would sing, 'now the old king is dead, Long Live the King.'.."
I have to agree with Goshin. Alcohol would be the worst. I have seen more lives and families destroyed by it than any other substance. I would rank them as alcohol -> marijuana -> cigarettes.
Tired of elections being between the lesser of two evils.When the debate is lost, slander becomes the tool of the loser. -Socrates
And, alcohol addiction is what causes most of the problems from alcohol. If a person is addicted to alcohol, without the alcohol (not just in recovery from it, but had they never started), it is possible that the person would have had a different addiction. Now that other addiction could be just as or less harmful, we just can't know.
"A woman is like a teabag, you never know how strong she is until she gets in hot water." - Eleanor Roosevelt
Keep your religion out of other people's marriages.