There is no real answer of who exactly invented it. For many years cocaine was used in medications and hair tonics. It was used for a cure all even though they were aware of side effects from the get go. Crack itself is a less pure form of freebase cocaine. It’s first epidemic use began in the 1980’s in the Bahama’s. Then it surged up through Florida, to New York and on ward. It’s a highly dangerous drug that creates a short lived state of euphoria. Victims of crack use only tend to crave more and more of the drug.