In November 2017 "more than five hundred people ... paid as much as $249 each to attend "the first-ever Flat Earth Conference", in a suburb of
Raleigh, North Carolina, U.S. According to a 2018
YouGov opinion poll, "just 66% of
millennials firmly believe" that Earth is round, with celebrities (rapper
B.o.B., basketball players
Kyrie Irving and
Wilson Chandler) advocating for flatness.
Sociological explanations for counterfactual beliefs and flat-earther Nathan Thompson In the
Information Age, the availability of communications technology and social media such as
YouTube,
Facebook and
Twitter have made it easy for individuals, famous or not, to spread disinformation and attract others to erroneous ideas. One of the topics that has flourished in this environment is that of the flat Earth. These sites have made it easier for like-minded theorists to connect with one another and mutually reinforce their beliefs. Social media has had a "levelling effect", in that experts have less sway in the public mind than they used to. YouTube has faced criticism for allowing the spread of misinformation and conspiracy theories through its platform, specifically, flat Earth. In 2019, YouTube stated that it was making changes in its software to reduce the distribution of videos based on conspiracy theories including flat Earth. Professor Asheley Landrum "called on scientists themselves to fight back by using YouTube as a platform to communicate their own work. "We don't want YouTube to be full of videos saying here are all these reasons the Earth is flat," she said. "We need other videos saying here's why those reasons aren't real and here's a bunch of ways you can research it for yourself."" In the documentary
Behind the Curve (2018) (which follows prominent modern flat-Earthers including
Mark Sargent and Patricia Steere, as well as astrophysicists and psychologists who attempt to explain the growing fad), professor of psychiatry Joe Pierre offers as explanations: the
Dunning-Kruger effect (the phenomenon whereby ignorance in a given field makes people unable to recognize their own ignorance or lack of ability in that field); misunderstandings of simple observation; pseudoscientific practices which fail to separate reliable from unreliable conclusions; and a progressive divergence from reality that starts with a belief that conventional information sources and the government cannot be trusted. Out of the necessity to explain photographs of Earth in space, the observations of astronauts, why all major institutions such as governments, media outlets, schools, scientists, and airlines assert that the world is a sphere, etc., modern flat-Earthers very commonly embrace some form of conspiracy theory. As Darryle Marble, a speaker at the Flat Earth Conference, told his audience, after watching hours of YouTube conspiracy videos on
Sandy Hook,
9/11,
false flags, the
Bilderbergers,
Rothschilds,
Illuminati – "Each thing started to make that much more sense. I was already primed to receive the whole flat-Earth idea, because we had already come to the conclusion that we were being deceived about so many other things. So of course they would lie to us about this." Patricia Steere admitted in
Behind the Curve that she would not believe an event like the
Boston Marathon bombing was real unless she had gotten her own leg blown off. Flat Earth believers in the documentary also professed belief in conspiracy theories about
vaccines,
genetically modified organisms,
chemtrails,
9/11, and
transgender people; some said dinosaurs and evolution were also fake, and that
heliocentrism is a form of
Sun worship. The scientific experts in
Behind the Curve pointed to
confirmation bias as a way to maintain a counterfactual belief, by cherry-picking only supporting evidence, and dismissing any disconfirming evidence as part of the purported global conspiracy. Some flat Earth believers, such as authors Zen Garcia and Edward Hendrie, cite the Christian Bible as evidence. Some critics of the flat Earth idea, such as astronomer Danny R. Faulkner, are
young Earth creationists and attempt to explain away the Bible's supposed flat Earth language. On 3 May 2018,
Steven Novella analysed the modern belief in a flat Earth, and concluded that, despite what most people think about the subject, the believers are being sincere in their belief that Earth is flat, and are not "just saying that to wind us up". He stated that: The British sceptical activist
Michael Marshall attended the annual Flat Earth UK Convention on 27–29 April 2018 and noted disagreement on several views among believers in a flat Earth. To Marshall, one of the most telling moments at the convention was the "Flat Earth Addiction" test that was based on a checklist used to determine whether someone is in a
cult, without the convention attendees realising the possibility of themselves being in a cult. (Flat Earth International Conferences, organized by Robbie Davidson, are unaffiliated with the Flat Earth Society. According to Davidson, the "Earth is ... a stationary plane, with the sun, moon, and stars inside a dome", while the Flat Earth Society promotes a model in which Earth is "a disk flying through space", and which Davidson finds "incredibly ridiculous".) According to the most widely spread version of current flat-Earth theory, NASA is guarding the Antarctic ice wall that surrounds Earth. The publicly perpetuated image is kept up through a large-scale practice of "compartmentalization", according to which only a select number of individuals have knowledge about the truth. The first faction subscribes to a faith-based conflict in which atheists use science to suppress the Christian faith. Their argument is that atheists use pseudo-science – evolution,
Big Bang, and the round Earth – to make people believe that God is an abstract idea, not real. Instead, their arguments use the Scripture – word-by-word – to support an argument that enables God to really exist. This faction frames flat-Earth arguments as revelatory. The 2018 documentary
Behind the Curve followed two groups of American flat Earth believers who were attempting to gather first-hand empirical proof for that belief. One group from the YouTube show GlobeBusters used a
ring laser gyroscope in an attempt to show that Earth was not rotating. Instead, they detected the actual 15-degree-per-hour rotation of Earth, a measurement they dismissed as corrupted by the device somehow picking up the rotation of the "
firmament". Another group used lasers in an attempt to show a several-mile stretch of water is perfectly flat by measuring the distance between the water level and the laser beam along three vertical posts. They were unable to align the beam as they expected to because the surface of the still water was in fact bent by several feet over the distance measured; the experiment was dismissed as inconclusive. Similar experiments involving lasers projected across a long, flat surface are deemed unreliable due to not taking into account atmospheric refraction and the divergence of light.
Behind the Curve illustrated how flat Earth believers rely on poorly-verified claims. Mark Sargent claimed to have watched
flightaware.com for a very long time to check if any flights traveled between continents in the southern hemisphere, which in his disc model would be much further apart than they are on the globe. He stated that he saw no such flights, and took this as evidence for the disc model. Caltech astrophysicist Hannalore Gerling-Dunsmore went to the site and immediately found flights that contradicted Sargent's claims. Optical illusions of sufficiently translucent clouds appearing to "pass" behind the
Sun due to the insufficient contrast sunlight directly in front of the
Sun produces have been recorded on video and also used by flat-earthers to try to show that the
Sun isn't in
outer space and the Earth is flat. The
solar eclipse of 21 August 2017 gave rise to numerous YouTube videos purporting to show how the details of the eclipse prove that Earth is flat. In 2017, "the Tunisian and Arab scientific and educational world" had a scandal when a Ph.D. student at the
University of Sfax in
Tunisia submitted a
Ph.D. dissertation "declaring Earth to be flat, unmoving, young (only 13,500 years of age), and the centre of the universe". In 2018, astronomer
Yaël Nazé analyzed the controversy over the dissertation. The dissertation, which had not been approved by the committee overseeing environmental studies theses, had been made public and denounced in 2017 by Hafedh Ateb, a founder of the Tunisian Astronomical Society, on his Facebook page. In March 2019, social media personality
Logan Paul released a satirical documentary film about the flat Earth called
FLAT EARTH: To The Edge And Back. On December 14, 2024, retired businessman and pastor Will Duffy paid to bring believers in the concept of a flat earth to
Union Glacier Camp in Antarctica for them to witness day-long illumination. While participants of the so-called
Final Experiment had to concede they witnessed the midnight sun in Antarctica, not all of them accepted on the spot that Earth is a sphere.
Mike Hughes Mike Hughes, a daredevil/stuntman, planned to use a homebuilt crewed rocket to reach outer space. In a practice flight on 22 February 2020, the early deployment and separation of the return parachute allowed his rocket to fall unimpeded from an altitude of several hundred feet, killing him instantly. After Hughes' death, his public relations representative Darren Shuster stated that Hughes "didn't believe in flat Earth" and that it was "a PR stunt" to get publicity, while Michael Linn, who worked on the documentary ''Rocketman: Mad Mike's Mission to Prove the Flat-Earth'', said that Hughes' belief appeared genuine.
Social consequences and responses Behind the Curves filmmakers spoke with several people who said that as a result of their flat Earth beliefs they had lost romantic partners and no longer spoke to many friends and family. One said he was tired of being told he was an idiot. The Facebook group Flat Earth Match is a dating site used by some to find romantic partners who share these beliefs. Experts pointed out that after social ties to people outside the flat Earth community are lost, one consequence of abandoning the flat Earth belief would be loss of all remaining relationships. Caltech physicist Spiros Michaelakis stated that instead of denigrating flat Earthers, scientists should do a better job of teaching scientific facts. Various scientific and medical experts in the documentary supported improving
scientific literacy and avoiding marginalization of flat Earthers. They pointed out that people who distrust all of science, including truths about vaccines, evolution, and climate change, would make poorly informed decisions, and that people who do not exercise the skill of
critical thinking can be easily manipulated. They also pointed out that some believers were motivated to spread false ideas, and that because these ideas are unconstrained by facts they can mutate and become less harmless than a mere belief about the shape of Earth.
Prevalence In 2020, it was reported that based on polling by
Datafolha, 7% of Brazilians believed in a flat Earth. A 2018 YouGov poll found that around 4% of the population of the United States believed in flat Earth, while the POLES 2021 Survey found around 10% of the United States population believed that Earth is flat. A 2019 YouGov survey found that around 3% of British people supported flat Earth. ==The term "flat-Earther"==