I have already addressed this in several places- here, and here- so I won’t dwell on things much. Instead, I want to reflect on an article I just read regarding the Vatican participating in an astrobiology conference to discuss the question.
In my previous posts, I argued that if aliens appeared, they might fly in the face of current expectations that are drenched in an evolutionary (and atheistic) outlook. Namely, we may find that these intelligent agents believe in God. They may not, as Richard Dawkins smugly posits, inquire first as to whether not humans have ‘discovered’ evolution. Let us allow that it is a possibility… but they may also possibly have a concept of God and creation that is identical, in theological principle, to what we see in the Christian Scriptures. Naturally, they may have a belief system identical to other systems.
My point is that they may deviate a great deal from the common narrative of aliens either being hostile consumers of resources or super-intelligent, highly technological and benevolent agents that have transcended petty human foibles and myths. In this narrative, both sides assume not just evolution but atheistic presuppositions.