Why Cannabis Was Made Illegal: Power, Profit, and Politics
The Ancient History of Cannabis
For thousands of years, cannabis has been used as medicine, food, and fiber. In 19th- and early 20th-century America, you could even buy cannabis tinctures at local pharmacies. Cannabis was common, accepted, and safe — after all, it has never caused a single recorded death from overdose. This history is well documented in The Emperor Wears No Clothes by Jack Herer, a must-read for anyone interested in cannabis activism.
So how did this ancient plant go from being sold in pharmacies to being demonized and criminalized? The answer has little to do with public health and everything to do with racism, politics, and profit.
Harry Anslinger and the Birth of Cannabis Prohibition

When alcohol prohibition ended in 1933, Harry Anslinger — former head of the Federal Bureau of Prohibition — needed a new public enemy. As the newly appointed head of the Federal Bureau of Narcotics, Anslinger chose cannabis.
He launched a racist smear campaign linking cannabis use to Black and Hispanic communities, claiming it caused violence, insanity, and moral decay. Newspapers ran sensational headlines like “Marijuana: Assassin of Youth”, spreading fear instead of truth.
Medical professionals pushed back, but Anslinger silenced them. Doctors who refused to cooperate were jailed. Despite cannabis being a legitimate medicine for pain, insomnia, and migraines, Anslinger’s campaign succeeded with the Marihuana Tax Act of 1937, effectively criminalizing the plant.
DuPont, Hemp, and the War on Industry

Cannabis prohibition was not only about racism and job security — it also served corporate interests.
During the same period, DuPont had developed nylon, a synthetic fiber competing directly with hemp, which could produce rope, paper, fabric, fuel, and biodegradable plastics. Through political and personal connections, DuPont influenced cannabis prohibition to eliminate this threat.
Nixon, Reagan, and the War on Drugs
Cannabis prohibition was reignited under President Richard Nixon. Despite medical experts confirming cannabis’s safety, Nixon admitted the “War on Drugs” was a political tool to target anti-war protesters and Black communities.
In the 1980s, Ronald Reagan escalated the drug war, imposing harsh penalties that fueled mass incarceration and deepened cannabis stigma — all despite decades of evidence proving its relative safety.
Who Benefits from Keeping Cannabis Illegal?
Even today, cannabis remains federally illegal, despite widespread state-level legalization. Powerful interests continue to profit:
- Big Pharma: Cannabis threatens profits from opioids, sleep aids, and anxiety medications.
- Prison systems: Both private and public prisons profit from high incarceration rates, including non-violent cannabis arrests.
- Corporate interests: Industries that fear hemp competition, from plastics to paper, lobby to keep cannabis restricted.
The truth is clear: cannabis prohibition was never about public safety. It has always been about protecting profits.
The Path Forward
Cannabis has been used safely for millennia. Millions of lives have been harmed by unjust laws built on lies, racism, and greed.
As more people learn the real history, pressure grows on lawmakers to end prohibition. Legalization is not just about personal freedom — it’s about undoing decades of systemic injustice, corporate manipulation, and political gamesmanship.
The fight continues, but the truth is on our side. One Love.