The crack epidemic had its origins in the 1970s and became widespread in the 1980s[1]. Crack was finally targeted in 1986 with laws that heavily punished crack dealers. This happened after crack became widespread throughout major American cities.[2]

"The murders and general lawlessness that you reference from the 80s are a direct result of the War on Drugs."

Where were the "murders and general lawlessness" in other countries that had even more expansive Wars on Drugs, like Singapore or Taiwan? America's War on Drugs is relatively mild compared to these countries that sentence drug traffickers to death.

[1] http://www.crack-facts.org/historyofcrack.html [2] https://en.wikipedia.org/wiki/Crack_epidemic#History