How the Richest Man in America Killed Hemp to Protect His Investments

The Three Men Who Killed Hemp

The story of how hemp became illegal in America isn’t a story about public health or safety. It’s a story about three incredibly wealthy men who stood to lose fortunes if hemp remained legal — and had the political power to make sure it didn’t. Their names: Andrew Mellon, William Randolph Hearst, and the DuPont family. Together, they orchestrated one of the most successful corporate lobbying campaigns in American history, and we’re still living with the consequences nearly 90 years later.

Andrew Mellon: The Banker Who Bought a Bureau

Andrew W. Mellon was the Secretary of the United States Treasury from 1921 to 1932 — and simultaneously one of the richest men in America. His banking empire, Mellon Bank, was one of the largest financial institutions in the country. More importantly for our story, Mellon was a major investor in DuPont, the chemical giant that was about to make a massive bet on synthetic fibers.

In 1930, Mellon used his position as Treasury Secretary to create the Federal Bureau of Narcotics (FBN) — a brand-new federal law enforcement agency. And who did he appoint to run it? Harry J. Anslinger, his nephew-in-law. Anslinger was married to Mellon’s niece, Martha Kind Denniston. This wasn’t a competitive hiring process. This was a family appointment, made by the most powerful financial figure in the federal government, to serve specific financial interests.

Anslinger would go on to run the FBN for 32 years — from 1930 to 1962 — becoming the architect of America’s entire drug prohibition framework. Every lie, every racist propaganda campaign, every destroyed life traces back to this one appointment.

DuPont: The Chemical Giant That Needed Hemp Dead

Here’s where the timing gets impossible to ignore.

On February 16, 1937, DuPont received its patent for nylon — a synthetic fiber that would go on to generate billions in revenue. DuPont had also recently patented new processes for making plastics from oil and paper from wood pulp using sulfate/sulfite chemical processes. Every single one of these products had a natural competitor: hemp.

Hemp fiber was stronger than nylon. Hemp paper lasted longer than wood-pulp paper — the original Gutenberg Bibles were printed on hemp, and they’re still readable after 500 years. Hemp-based plastics were biodegradable. DuPont’s entire product line was threatened by a plant that any farmer could grow for pennies.

The Marihuana Tax Act was introduced in Congress in April 1937 — just two months after DuPont’s nylon patent. It passed on August 2, 1937. DuPont’s own annual report to stockholders that year noted that the company anticipated “radical changes” from “ichievement of legislative protection against unfair competition.” They weren’t even subtle about it.

William Randolph Hearst: The Media Mogul With Timber to Protect

William Randolph Hearst owned the largest newspaper chain in America — and he also owned vast timber holdings across the country. His newspapers consumed enormous quantities of wood-pulp paper. Hemp paper was a direct threat to those investments.

Hearst used his media empire to wage a systematic propaganda campaign against cannabis. His newspapers ran lurid, racist stories about “marihuana” — deliberately using the Spanish-sounding word instead of “cannabis” or “hemp” to associate the plant with Mexican immigrants and Black Americans. Headlines screamed about “reefer madness,” crazed minorities, and violent crimes allegedly committed under the influence.

This wasn’t journalism. It was a calculated business strategy disguised as moral panic. Hearst’s papers ran these stories for years, building public fear to the point where Congress could pass prohibition without serious opposition.

The Hemp Decorticator: The Machine They Had to Kill

The timing of prohibition makes even more sense when you understand the hemp decorticator. In the mid-1930s, new mechanical decorticating machines made it possible to process hemp fiber cheaply and efficiently for the first time. Before this technology, hemp processing was labor-intensive. The decorticator changed everything — it made hemp a viable industrial competitor to both DuPont’s synthetics and Hearst’s timber, at scale.

In February 1938, Popular Mechanics published its famous article calling hemp the “New Billion-Dollar Crop.” The article — which had been written months earlier, before the Marihuana Tax Act took effect — predicted that hemp would become America’s first billion-dollar agricultural commodity. The magazine described the decorticator as a breakthrough that would revolutionize farming.

But by the time the article hit newsstands, it was already too late. Hemp had been effectively illegal since October 1937. The billion-dollar crop was dead on arrival.

The Doctor Who Tried to Stop It

Not everyone went along quietly. Dr. William C. Woodward, the Legislative Counsel of the American Medical Association, testified before Congress against the Marihuana Tax Act. Woodward was furious that Congress had used the term “marihuana” instead of “cannabis” throughout the legislation — a deliberate tactic that prevented most doctors from realizing the bill targeted a plant they used medicinally.

“The American Medical Association knows of no evidence that marihuana is a dangerous drug… We cannot understand yet, Mr. Chairman, why this bill should have been prepared in secret for two years without any intimation, even, to the profession, that it was being prepared.”

Congress’s response? A committee member told Woodward: “If you want to advise us on legislation, you ought to come here with some constructive proposals rather than trying to throw obstacles in the way of something that the Federal Government is trying to do.”

The bill passed. Medical science was ignored. The fix was in.

Matt’s Take

Follow the money. Every single time.

The richest man in America created a federal agency and installed his own nephew-in-law to run it. That nephew-in-law launched a propaganda campaign against a plant that threatened the investments of his uncle’s business partners. DuPont patented nylon the same year hemp was banned — and told their stockholders they expected “legislative protection” from competition. Hearst used his newspaper monopoly to manufacture public hysteria to protect his timber empire.

And when the American Medical Association — the actual experts on drugs and health — stood up and said “this is wrong, this plant isn’t dangerous, and you’re hiding what this bill actually does,” Congress told them to sit down and stop making trouble.

This was never about public safety. This was about three rich men protecting their money. And 89 years later, people are still sitting in prison because of it.

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