An incredibly hypothetical question, of course. Considering that there is no known evidence of any contact with extraterrestrials there is doubt over whether they even exist, at least in our neck of the woods. But presuming that we do one day, probably through radio, come across signals that we can be definite are extraterrestrial? Face to face contact itself would be difficult, of course, but what would be the ramifications of such a discovery? What effects would it have on our cultures, on our politics, on our religions, and more importantly, on how we view each other and our place in the Universe. Or would their be any sort of impact whatsoever?
In my opinion it would profoundly affect our view of ourselves, particularly in terms of philosophy. Many religions place emphasis on the importance of humanity, and if an intelligent species from beyond Earth is discovered (one that is probably far more advanced and intelligent than us), I believe religions will have to make huge changes and/or possibly rebrand themselves altogether. In terms of our culture (hence why I put this thread in the Culture section) I believe it would be very humbling for us, and our views of ourselves and the Universe would change massively.
What are your thoughts?