A comeback for the gateway drug theory?

What the medical community knows about addiction has evolved significantly since the 1930s
The New York Times (US)
Thursday, December 7, 2017

Scientists and politicians still debate whether using “soft” drugs necessarily leads a person down a slippery slope to the harder stuff. Critics note that marijuana has, in some cases, been shown to actually prevent people from abusing other substances. But new research is breathing fresh life into the perennially controversial theory, and the timing seems apt. As marijuana legalization and the opioid epidemic sweep across the country, parents are once again questioning the root causes of addiction. And politicians opposed to legalization, including Attorney General Jeff Sessions and Gov. Chris Christie of New Jersey, have routinely used the gateway effect as their chief argument against reform.