The gateway effect is a wonderful example of the triumph of marketing over critical thinking skills. Only DeBeers does it better.
People predisposed to addictive behavior are indeed more likely to seek out more potent highs over time, as they build up mental and physical tolerances to their substance-of-the-moment.
Five seconds of googling will turn up credible studies that fall on both sides of the issue. What the pro-gateway theory studies tend to ignore, though, is that people predisposed to addictive behavior are more likely to start doing illegal drugs in the first place. They'll start with whatever is available, and pot's not too hard to find. It should be no surprise, then, if a subset marijuana users graduate to harder drugs--it's just Darwinism in action.
Example studies:
Anti-Gateway: http://www.rand.org/news/press.02/gateway.html
Pro-Gateway: http://www.columbia.edu/cu/record/ar...rd2010.24.html
People predisposed to addictive behavior are indeed more likely to seek out more potent highs over time, as they build up mental and physical tolerances to their substance-of-the-moment.
Five seconds of googling will turn up credible studies that fall on both sides of the issue. What the pro-gateway theory studies tend to ignore, though, is that people predisposed to addictive behavior are more likely to start doing illegal drugs in the first place. They'll start with whatever is available, and pot's not too hard to find. It should be no surprise, then, if a subset marijuana users graduate to harder drugs--it's just Darwinism in action.
Example studies:
Anti-Gateway: http://www.rand.org/news/press.02/gateway.html
Pro-Gateway: http://www.columbia.edu/cu/record/ar...rd2010.24.html

). I can see some correlation there, but not neccessarily causation.
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