By the end of the Second World War, there were only 20k heroin addicts in the United States, and both production and transportation networks were in utter ruins worldwide. One entity chose to actively rebuild and revive the entire global heroin trade.
That was the CIA.
@gommunisd
If you never heard of the CIA and took a very top down view of its history you would be forgiven for thinking its entire purpose was a drug cartel.