Overview
The Flat Earth theory is the belief that Earth is not a spherical planet but rather a flat plane or disk. Despite being scientifically disproven for over 2,000 years, this belief has experienced a significant resurgence in the 21st century, fueled by social media platforms like YouTube, Facebook, and TikTok.
Modern flat Earth beliefs are classified as pseudoscience and represent a form of science denial. According to 2021 surveys, approximately 4-10% of Americans express some agreement with flat Earth claims, with higher rates among millennials and those who distrust institutional authority.
"The ultimate motivation of the conspiracy... is hiding God. When you break down the text of what it represents, there's no way you can get a spinning heliocentric globe out of anything in the Bible."
— Rob Skiba, flat Earth influencer
Historical Origins
Ancient Cosmologies
Many ancient civilizations (Egypt, Mesopotamia, China, Norse) depicted Earth as flat. However, Greek philosophers including Pythagoras and Aristotle provided empirical evidence for sphericity by 300 BCE.
Rowbotham's Revival
Samuel Birley Rowbotham publishes Zetetic Astronomy: Earth Not a Globe, reviving flat Earth belief as backlash against scientific progress. Creates the "zetetic method" emphasizing sensory observation over scientific theory.
Flat Earth Society
Samuel Shenton establishes the International Flat Earth Research Society in Dover, England. Shenton famously dismisses satellite images: "It's easy to see how a photograph like that could fool the untrained eye."
YouTube Explosion
Mark Sargent's "Flat Earth Clues" series and Eric Dubay's "200 Proofs Earth is Not a Spinning Ball" go viral. YouTube's recommendation algorithm drives millions to conspiracy content.
The Models
Flat Earthers do not agree on a single model. Several competing variants exist:
The Azimuthal Disk
The most common model. North Pole at center, Antarctica forms an ice wall (150+ feet high) surrounding the edge holding oceans in place. Used in UN logo (cited as "evidence").
The Dome Model
Flat disk enclosed under a solid dome ("firmament") made of blue ice. Sun and Moon are 32-50 miles in diameter, circling 3,000-5,500 km above. Stars are lights on the dome.
The Infinite Plane
Antarctica doesn't mark an edge; Earth extends infinitely in all directions as a flat plane. No way to "fall off." Temperatures approach absolute zero as you travel outward.
Key Claims vs. Reality
Standing on Earth's surface, the horizon appears perfectly flat to the naked eye.
At sea level, horizon curvature is subtle (8 inches per mile). Become visible above 35,000 feet. High-altitude balloon photos consistently show curvature.
Water always rests flat, impossible to curve around a ball.
Water seeks the lowest potential energy state—toward Earth's center of mass. Large bodies follow Earth's curvature. Lakes/ oceans conform to the geoid.
All photos of Earth from space are CGI composites. Astronauts are actors.
Photos from NASA, ESA, Roscosmos, private companies (SpaceX), and amateur high-altitude balloons all confirm spherical Earth. USSR tracked Apollo missions.
Objects fall because Earth accelerates upward at 9.8 m/s².
Gravitational force varies by latitude (less at equator due to spin). Satellites orbit. Cavendish experiment measured gravity between masses.
The Conspiracy Framework
Flat Earth belief requires accepting a massive, multi-generational conspiracy involving:
🚀 NASA
Fakes space missions to maintain $25B+ budget. All astronauts are actors. ISS is a soundstage.
🧊 Antarctica
The 1959 Antarctic Treaty prevents exploration to hide the ice wall/dome edge. Armed guards patrol.
🌍 The UN
Logo depicts flat Earth map (actually azimuthal equidistant projection). Working toward "New World Order."
🔺 Freemasons
Newton, Galileo, Armstrong all Freemasons. Round Earth promoted to hide God, enable control.
The "Final Experiment" (2024)
In December 2024, pastor Will Duffy took prominent flat Earthers to Antarctica to witness the 24-hour sun. Most conceded they saw it, though some maintained the trip was staged or their interpretation was wrong. The phenomenon is impossible on most flat Earth models.
Psychology of Belief
Who Believes?
- 4-10% of Americans express flat Earth agreement (varies by poll)
- Higher among millennials and Generation Z
- Correlates with distrust of institutions, religious fundamentalism, and other conspiracy beliefs
- YouTube-driven: 39 of 40 flat Earthers at one conference cited YouTube recommendations as entry point
Why It Spreads
Generalized skepticism of government, media, and scientific institutions.
Strong in-group identity; "waking up" creates bond with fellow believers.
Feeling of possessing secret truth that "elites" suppress.
YouTube's recommendation system (2015-2019) heavily promoted conspiracy content.
"The flat earth is kind of the Rosetta stone of conspiracy theories... It makes all the rest of it make sense."
— Mark Sargent, explaining how flat Earth connects moon hoax, JFK assassination, and other conspiracies
Scientific Reality
Proofs of Spherical Earth
Hulls disappear first, masts last—only possible with curvature.
Earth always casts round shadow on Moon, regardless of observer location.
Different constellations visible in Northern vs. Southern hemispheres.
Great circle routes only make sense on sphere. Flat map would require impossibly long southern routes.
Thousands in orbit, tracked by independent observers, enable GPS.
Sunrise/sunset times vary by location—only explained by rotating sphere.
Quick Calculation: Horizon Drop
At altitude h, horizon distance d ≈ √(2hR), where R = Earth's radius (6,371 km).
At 35,000 feet (cruising altitude): horizon is ~370 km away with noticeable curvature.
Key Figures
Samuel Birley Rowbotham
1816–1884English inventor who revived flat Earth belief with Zetetic Astronomy (1849). Conducted "Bedford Level Experiment" claiming to prove no curvature.
Samuel Shenton
1903–1971Founded Flat Earth Society (1956). Pioneered the "NASA conspiracy" angle, claiming satellite photos "fooled the untrained eye."
Mark Sargent
Active 2015–presentModern movement's most prominent figure. "Flat Earth Clues" YouTube series. Compares Earth to "Truman Show enclosed world."
Eric Dubay
Active 2014–presentCreated "200 Proofs Earth is Not a Spinning Ball" (2014/2018). Claims older flat Earth societies are "controlled opposition."
Mike Hughes
1956–2020"Mad Mike" — daredevil who built rockets to "prove" flatness. Died in 2020 crash during launch attempt.