The 18th amendment to the United States constitution came into force on January 29, 1920. The manufacture, sale, transportation import or export of intoxicating liquors was prohibited. Thus began the greatest social experiment, perhaps, in human history.
Tasmania is heading back to the 1920s by seeking to launch its own prohibition era -- banning the sale of cigarettes to anyone born after 2000, effectively preventing the millenial generation from ever taking up the habit. Tasmanians who are now 12 years old would never be able (legally) to smoke as adults; those who are now 13 would be able to.