Way back in 1961, the United Nations adopted a single convention on the categorization, laws, and enforcement of narcotic drugs.
At that time, cannabis was categorized as both Schedule I and Schedule IV, which put it under the same umbrellas as narcotics like heroin, LSD, and fentanyl.
But in a landmark vote, the UN announced on December 2, 2020 that cannabis and cannabis resin would no longer be categorized under Schedule IV.