The Wildest Conspiracy Theories in American History

As the fallout from the Epstein files and war in Iran continue, we’re taking a closer look at the most polarizing conspiracy theories in American history.

In the current age of information, it’s still so unbelievable that folks come up with the craziest theories and run with them. Whether they’re true or not, conspiracy theories like the alleged UFO found in New Mexico and FEMA detainment camps have shaped the world we live in today.

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As the country continues to deal with the fallout of the infamous Jeffrey Epstein files and the ongoing war in Iran, The Root is taking a closer look at some of the most polarizing conspiracy theories in American history.

UFO Found in New Mexico

NASA Administrator Bill Nelson attends a press conference at NASA headquarters September 14, 2023 in Washington, DC. NASA announced the agency has appointed a new director of research to study “unidentified anomalous phenomenon”, formerly referred to as UFOs. (Photo by Win McNamee/Getty Images)

In 1947, something mysterious happened in Roswell, N.M., when a large object crashed outside of a small ranch in the area, but this is where many have different theories about what exactly landed. According to conspiracy theorists, it was a UFO (Unidentified flying object) becoming the first public sign that aliens do exist. The U.S. government, however, initially insisted it was some type of flying saucer. Then, they quickly changed to telling the world it was actually a weather balloon,” BBC reported.

Tupac Is Alive

LAS VEGAS, NEVADA – SEPTEMBER 29: A booking photo of Duane “Keefe D” Davis is shown on a television monitor as Clark County Sheriff Kevin McMahill (L) and Las Vegas Metropolitan Police Department Lt. Jason Johansson speak during a news conference at the LVMPD headquarters to brief media members on Davis’ arrest and indictment for the 1996 murder of Tupac Shakur on September 29, 2023 in Las Vegas, Nevada. A Nevada grand jury indicted Davis on one count of murder with a deadly weapon in the fatal drive-by shooting of rapper Tupac Shakur. (Photo by Ethan Miller/Getty Images)

In 1996, rapper Tupac Shakur was shot and killed during a drive-by shooting in Las Vegas… or at least that’s what most people believe. There is, however, a not-so-small group of folks around the world who believe the “California Love” rapper is still alive, just in hiding. According to many Reddit threads and rumors online, Shakur is allegedly living in Cuba or somewhere in Mexico. Meanwhile, the man charged with his murder, Duane Keith “Keffe D” Davis, is currently in prison.

Flat Earth Theory

View of the Sinai Peninsula showing the area from the Nile River into Iraq, the Fayum Depression, the valley of the lower Nile and fertile Nile Delta are vegetated and dark in contrast to the barreness of the surrounding desert, as seen from the Space Shuttle Columbia during shuttle mission STS-52, 22nd October to 1st November 1992. The primary mission objectives of STS-52 are the deployment of the Laser Geodynamics Satellite II (LAGEOS-II), a joint effort between NASA and the Italian Space Agency (ASI), and the operation of the United States Microgravity Payload-1 (USMP-1). (Photo by Space Frontiers/Archive Photos/Hulton Archive/Getty Images)

Despite countless studies, expert testimony and physics, there are too many people on Earth who believe in the flat-Earth conspiracy. As the name suggests, some folks claim we live on a flat plane covered by a spherical dome, according to CNN. These people deny scientific discovery and most don’t believe we ever went to the moon (but we’ll get into that later). There are flat Earth conventions and meetings going down annually around the world. Even some celebrities with influence claim the earth is not a sphere. B.o.B and Kyrie Irving are just a couple on that pretty short list, PEOPLE reported.

AIDS in Black Community

LOS ANGELES, CA – JUNE 05: A woman gets an istant HIV/AIDS test inside a moblile clinic of John Wesley Community Health Institute during a health fair sponsored by World Literacy Crusade and the American Health and Education Clinics at the Church of Scientology community center on June 5, 2013 in Los Angeles, California. The event will also include a town hall meeting to discuss physical and mental health therapies for Latino and black communities. (Photo by Kevork Djansezian/Getty Images)

It’s no secret many Black Americans believe the government targets urban communities for medical experiments. But since the rise of the HIV/AIDS pandemic in the 1980s, theories that the government was responsible for the rise in the virus remain prevalent. A 1999 study conducted by Dr. Elizabeth A. Klonoff and Dr. Hope Landrine found 27 percent of Black people in California believe that “HIV/AIDS is a man-made virus that the federal government made to kill and wipe out black people,” a door-to-door survey found. Another 23 percent were unsure.

Government Spying on Americans

DELRAY BEACH, FLORIDA – MAY 24: Two Rock Pigeon birds mingle at the Wakodahatchee Wetlands on May 24, 2025 in Delray Beach, Florida. The warmer climate found in the southern United States provides a welcome habitat for a wide assortment of aquatic birds and other wildlife. (Photo by Bruce Bennett/Getty Images)

One widely accepted conspiracy theory is that the government is secretly spying on us for nefarious reasons. From theories that birds were manufactured by the government to monitor civilians from the sky, all the way to technological features like “Siri” and “Hey Google,” which collect data to sell to the highest bidder, there’s no shortage of hypotheses on why this could be happening. In 2013, former National Security Agency (NSA) intelligence contractor Edward Snowden leaked information exposing the existence of global surveillance programs.

Obama Was NOT the First Black President

ALTADENA, CALIFORNIA – JUNE 01: Eaton Fire survivors and supporters march past a mural depicting former President Barack Obama, while calling for an equitable recovery and restoration process, on June 01, 2025 in Altadena, California. The DENA Rise Up march and rally brought together community members calling for a “safe, fair, inclusive and equitable” recovery following the second-most destructive wildfire in California history. (Photo by Mario Tama/Getty Images)

Black Americans celebrated when former President Barack Obama won his first term in 2008, making him the first Black president in history… But, many folks believe Obama was only the first visibly Black leader of the first world. Theories that Abraham Lincoln and Warren Harding– the 29th president– had Black blood remain popular among a small group of theorists, according to NPR, although there is no proof to back up this claim.

FEMA Camps

WASHINGTON, DC – OCTOBER 8: The Federal Emergency Management Agency Headquarters, in Washington is photographed on October 8, 2024 in Washington, DC. FEMA is running low on personnel, with only 9% of staff available as Hurricane Milton, with 175 mph winds, approaches Tampa, FL; Compared to 25% availability in previous years. (Photo by Kent Nishimura/Getty Images)

FEMA (Federal Emergency Management Agency) has been an important entity helping communities across the nation recover from natural disasters. After events like Hurricane Katrina in New Orleans and Hurricane Helene in Florida, many expressed suspicions on whether FEMA is secretly kidnapping people and sending them to detainment camps.

Of course, no evidence supports this conspiracy, but that hasn’t stopped folks from believing it. “‘FEMA camp’ rumors are founded in long-standing conspiracy theories intended to discredit our efforts to help survivors,” the government agency stated, according to NBC News. “FEMA does not round up or detain people, does not enact martial law, does not set up internment camps, and does not secretly operate mining settlements.”

George W. Bush Is Responsible For 9/11

Former President George W. Bush and former first lady Laura Bush attend the Inauguration of Donald J. Trump in the U.S. Capitol Rotunda on January 20, 2025 in Washington, DC. Donald Trump takes office for his second term as the 47th president of the United States. (Photo by Julia Demaree Nikhinson – Pool/Getty Images)

Obviously, this one had to make the list. After the Sept. 11, 2001 attacks on the Twin Towers and the Pentagon, then-president George W. Bush declared a Global War on terror in Iraq and Afghanistan. Many Americans theorized Bush was actually responsible for the attacks, eventually misleading Americans into getting into war in the Middle East. Terrorist organization Al Qaeda claimed responsibility for the 2001 attacks.

COVID-19 Vaccine Microchips

MIAMI, FLORIDA – MAY 29: In this photo illustration, Ruth Jones, Immunization Nurse, holds a Pfizer-BioNTech COVID-19 vaccine (brand name: Comirnaty) at Borinquen Health Care Center on May 29, 2025 in Miami, Florida. Health Secretary Robert F. Kennedy Jr. announced that he will no longer recommend that healthy children and pregnant people get COVID-19 shots. (Photo illustration by Joe Raedle/Getty Images)

In efforts to combat the ever-changing COVID-19 pandemic, vaccines by Pfizer, Novavax and Moderna were created. Millions of Americans have since received the vaccines, but many refused in fear that they would be injected with microchips. Tech billionaire Bill Gates refuted the claim in 2020… but that didn’t stop folks like Charlamagne Tha God from perpetuating the conspiracy theory. To be clear, there’s no evidence to support the claim that the government was inserting folks with microchips disguised as a vaccine.

Secret Cures for Cancer

NEW YORK, NEW YORK – OCTOBER 25: Anne Thompson speaks at the Breast Cancer Research Foundation (BCRF) New York Symposium & Awards Luncheon at New York Hilton on October 25, 2024 in New York City. (Photo by Bryan Bedder/Getty Images for BCRF)

According to Worldwide Cancer Research, over 25 percent of Americans believe the government is secretly hiding the cure for cancer. The reason boils down to theories that cancer treatments like chemotherapy are more profitable for the government than the actual cure. There are over 18 million Americans living with a history of cancer, according to the American Cancer Society.

We Never Went to the Moon

One of the most celebrated moments in American history was when humans walked on the moon in 1969. But many think photos and videos of the moon landing were faked by the government in efforts to compete with the U.S.S.R.– now known as Russia– during the Cold War. Others think the Apollo astronauts could not have survived Earth’s radiation field, according to the Royal Museums Greenwich.

Assassination of John F. Kennedy

US statesman John F Kennedy, 35th president of the USA, making a speech. (Photo by Central Press/Getty Images)

John F. Kennedy became the first U.S. president whose murder was captured on camera. But while his killer, a man named Lee Harvey Oswald, acted alone in the 1963 Dallas murder, many believe he didn’t act alone. The FBI determined Oswald acted alone after conducting more than 25,000 interviews.

Tuskegee Syphilis Study

In 1932, nearly 600 Black Americans — 400 of whom were diagnosed with syphilis — were enrolled in a program without their consent. There, the participants were given a placebo treatment for the cure without their knowledge. It wasn’t until 1972 that the public became aware of the inhumane research. The government eventually investigated, and the 40-year program was shut down, according to McGill University.

COINTELPRO

Photo by Maury Englander/FPG/Archive Photos/Hulton Archive/Getty Images

The FBI formed the Counter Intelligence Program (COINTELPRO) just one year after the Black Panther Party was established. The goal of the illegal program was to “expose, disrupt, misdirect, discredit, or otherwise neutralize” groups thought to threaten the country. This, however, just turned out to be a targeted attack against Black organizations, according to PBS.

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