Young Adults in U.S. Drinking Less Than in Prior Decades
news.gallup.com
news.gallup.com
Smoking rates dropped when it became clear it was killing vast amounts of people. I expect we’re seeing a similar thing happening.
A more controversial claim might be that decreasing levels of socialization, or shifting leisure preferences, among the youth also factor in. There have been plenty of studies in recent years that explore the seemingly-relevant decrease in sexual activity within that age group, for example (https://www.google.com/search?client=firefox-b-1-d&q=young+p...).