The Fermi Paradox

The Fermi Paradox is named after physicist Enrico Fermi and is often used by skeptics to "prove" that either intelligent alien life doesn't exist or that we are unable to communicate with it.

What Is The Fermi Paradox?

The paradox is that if advanced extraterrestrial civilisations exist, as many believe, then we should have encountered evidence of them by now. Yet we have no such conclusive evidence, merely ambiguous and controversial UFO sightings. As Fermi is reported to have asked: Where are they?

Resolving The Paradox

The paradox rests on two assumptions: 1) advanced alien life exists and 2) we have not encountered it. The easiest way to resolve the paradox is thus to challenge these assumptions.

Alien Life Does Not Exist

This is probably the most depressing option. Either our ideas of the universe are wrong and we are a lone freak of the cosmos, or alien life has evolved elsewhere but it's the nature of intelligent life to quickly destroy itself.

We Have Encountered Alien Life

Some people suggest that alien life does exist and we have encountered it - but it is so different to us that we simply haven't recognised it. Perhaps it hasn't recognised us either.

Positive Resolutions

Both those options resolve the paradox but in a "negative" way - they confirm that either alien life exists or it is so strange that it might just as well not exist. There are ways to resolve the paradox that do not rule out encounters between humanity and advanced alien civilisations. Most of these have been explored by science fiction writers many times.

The Prime Directive

Probably the most optimistic approach to the Fermi Paradox is the Star Trek idea: a federation of benign, intelligent aliens that avoids interference in the development of young races. When we're ready, they'll reveal themselves.

Quarantine

A less pleasant suggestion is that aliens have visited us - and have judged us unworthy and/or dangerous. Earth and humanity are thus under strict quarantine. If we do ever leave our solar system, who knows what they'll do.

The Experiment

Perhaps the reason we've never had contact with the aliens is that humanity is some sort of experiment. There are many people who believe that aliens have intervened at crucial moments of human evolution and/or history.

Humanity Who?

Although it would be a blow to our collective ego, perhaps we should admit that we're really not very interesting. If there are indeed thousands of planets on which life has evolved, why should the advanced species bother with ours? We haven't even broken the light barrier! We might merit the occasional scientific expedition, little more.

Those are just a few possible ways to resolve the Fermi Paradox, there are many more - both positive and negative. The paradox is interesting and raises important questions but it is not proof that we will be forever alone.

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