Cocaine and cocaine-based products were legal across Europe and North America in the late 19th and early 20th Centuries, championed by the likes of Sigmund Freud, who wrote several papers on the subject and experimented on himself: "[A] small dose lifted me to the heights in wonderful fashion." But the drug fell out of favour, became associated with vice and criminality, and was eventually banned across much of the world, as was coca, though the latter remained legal in Bolivia.