What do we do if SETI is successful?

Summary

The Search For Extra Terrestrial Intelligence (SETI) is evolving. We’ve moved on from the limited thinking of monitoring radio waves to checking for interstellar pushing lasers or even budding Dyson swarms around stars. To match our increased understanding of the ways we might find intelligence elsewhere in the galaxy, the International Academy of Astronautics (IAA) is working through an update to its protocols for what researchers should do after a confirmed detection of intelligence outside of Earth. Their new suggestions are available in a pre-print paper on arXiv, but were also voted on at the 2025 International Astronautical Congress (IAC) in Sydney, with potential full adoption early next year. This updated protocol marks the largest change in the 36 years there has been a protocol. THe IAA first created a “Declaration of Principles” in 1989 that was intended to suggest how humanity should react to a confirmed signal from an alien world. This protocol was updated in 2010, but those changes were largely just streamlining with little substantive differences. The update being put forth now, though, is significantly different in a number of important ways. It is intended to reflect the growing complexity of dealing with highly sensitive topics in the modern world, especially when dealing with social media. A big part of its intent is to protect the researchers who announce the discovery from online harassment, or worse. VIDEO Fraser interviews Seth Shostak from the SETI Institute But perhaps the most important single change is the suggestion of whether humanity should respond to a direct message. Previous versions of the protocol have suggested that yes, we should, and put few restrictions on doing so. The updated one suggests that the researchers should absolutely not send any reply until after the issue is discussed at the United Nations, which makes sense, though getting the UN itself to agree to anything at this point seems like a hard ask. To be clear, as it ...