So, a lot of people are saying marijuana is less dangerous, and I agree in most cases. ... However, marijuana has been known to be more harmful in specific situations, like the onset of bipolar and schizophrenia. At least, that's what I've been told by a certain medical professional. They did, however, do some studies on this: Cannabis-Induced episodes followed by schizophrenia http://bjp.rcpsych.org/content/187/6/510 Cannabis relation with onset of bipolarity http://www.sciencedirect.com/science/article/pii/S016517811300680X (the abstract gives you a good enough idea) Studies like these (there aren't very many out there, I suppose, since in many places it is not technically legal, as well as the fact that such relations between marijuana and mental disorders is a relatively small sector of research) make marijuana seem more dangerous to me, simply because I am very likely to develop a bipolar disorder, and I'd rather not have that. I can't find the article that I originally found regarding onset of bipolarity and marijuana, unfortunately, but you get the idea. As I've been raised, alcohol is ever-present in the house, but not in a bad way. I know that alcohol has a potential to be dangerous, but I've been raised to keep in mind that wine/beer are to go with meals, or to drink with friends as a social activity - not for the sole purpose of getting drunk (and now that I've been spoiled with dad's wine/beer/whiskey/tequila hobby-turned-business, I can't stand the taste of most drink-to-get-drunk drinks). So, to me personally, I see marijuana is a much scarier and potentially dangerous drug - for me.