Public opinion on extraterrestrial life

Research conducted on an international scale has revealed significant belief in extraterrestrial civilizations across diverse cultures.

• Glocalities Study (2017): A survey of 26,492 respondents across 24 countries found that 47% of participants believed in "the existence of intelligent alien civilizations in the universe." The study noted substantial cross-national variation, with belief rates ranging from 45% in the United States to 68% in Russia. The researchers categorized a segment of high-engagement believers as "Homo Universalis," a group characterized by unconventional thinking and high interest in science and politics.^[1]
• Western Nations Comparison (2015): A YouGov survey comparing attitudes in the United Kingdom, Germany, and the United States found that more than one in two people in all three nations believed living creatures with communication abilities exist outside Earth. Specifically, 56% of Germans, 54% of Americans, and 52% of Britons held this belief.^[2]

Public opinion in the United States has been frequently polled, revealing a trend of increasing belief in extraterrestrial phenomena.

• Pew Research Center (2021): A study found that 65% of Americans stated their "best guess" was that intelligent life exists on other planets.^[3]
• YouGov (2025): A survey conducted in November 2025 indicated that 47% of Americans believe aliens have "definitely or probably visited Earth" at some point in history. Furthermore, 30% of Americans explicitly believe that UFOs are probable alien ships or life forms.^[4]
• Political correlation: Data from 2025 suggested a partisan divide, with Democrats being more likely than Republicans to believe UFOs are of alien origin (34% vs. 26%).^[4]

Recent academic efforts have attempted to quantify the gap between public perception and expert consensus.

• Expert Consensus (2025): A survey published in Nature Astronomy by Vickers et al. established that 58.2% of astrobiology experts believe intelligent extraterrestrial life likely exists. This figure provides an empirical baseline against which public opinion can be compared, often revealing that the public underestimates the level of scientific interest in the subject.^[5]
• The "Cosmic Closet" Study (2025): Building upon the 2025 expert baseline, a study by Eldadi, Tenenbaum, and Loeb surveyed 6,114 highly educated and scientifically engaged individuals to compare public attitudes against expert opinion. The study revealed a near-universal personal conviction, with 95.01% of respondents believing that intelligent extraterrestrial life exists (and 62.59% holding definitive rather than probable convictions). However, the researchers identified a massive pluralistic ignorance among the public, coined the "cosmic closet," where participants underestimated the prevalence of this belief in their own social circles by 46.07 percentage points. ^[6]

Belief in extraterrestrial life varies significantly across different demographic groups.

Surveys indicate a negative correlation between high religious observance and belief in extraterrestrial intelligence.

• A 2021 Pew Research Center study found that 85% of self-described atheists and agnostics believe intelligent life exists beyond Earth. In contrast, this figure drops to 57% among U.S. Christians and 40% among white Evangelical Protestants.^[3]
• New Religious Movements: The mid-20th century saw the emergence of UFO religions, such as Raëlism and Heaven's Gate, which incorporate extraterrestrial contact into their theological frameworks.^[7]

• Student Populations: Surveys of student populations have shown exceptionally high belief rates. A 2019 study of Swedish high school and university students published in the International Journal of Astrobiology found that 90% believed in extraterrestrial life.^[8] Similarly, a 2020 survey of university students in Peru reported a 92% belief rate.^[9]
• Age: Younger Americans are generally more likely to believe in ETI than older cohorts. In 2015, YouGov found that 59% of 18-24 year olds in Britain believed in aliens, compared to only 45% of those over 60.^[10]

Research indicates that specific psychological orientations and media habits predict belief in intelligent extraterrestrial life. The 2025 study by Eldadi et al. found that exposure to UFO and UAP content was the strongest positive predictor of personal belief. Conversely, anthropocentrism (the belief that humans are exceptionally special) and institutional trust were strong negative predictors; individuals with lower trust in scientific and government institutions demonstrated a higher likelihood of believing in extraterrestrial intelligence. ^[6]