NASA's Theory Explains Why We May Be Alone in the Universe

According to the "Great Filter" idea, there may have been several different civilizations throughout the universe's history.

But before they could get in touch with us, they all exhausted themselves.

The secret to preserving our own civilisation may lay in discovering what aliens may have done to destroy themselves.

They contend that whatever looks most likely to endanger humanity may also be the greatest hazard to intelligent life elsewhere in the universe.

However, they emphasise that dysfunction is not unavoidable and that we may evolve as a species and get over our propensities for self-destruction.

Hanson: "I genuinely regard excessive government centralization as our next Great Filter's most probable cause."

It's plausible that the reason we haven't encountered aliens yet—rather than the fact that they're all dead—is simply because we haven't.

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