I think Fermi's Paradox talks about this. It would mean that the other civilization started almost at the same time as us (50-80k years is literally a second in the grand scheme of things). If they're behind us, it would mean that we're the first, hence we won't mean anyone until we discover them. If they're first, we would see the domination of their galaxy (if it's close enough to us). The first one makes it even more unlikely added to the other necessary things for life to begin (2 simultaneous life forms starting).
escaai t1_j0ys8ct wrote
Reply to comment by boundegar in Which theory about aliens is the most likely? by [deleted]
I think Fermi's Paradox talks about this. It would mean that the other civilization started almost at the same time as us (50-80k years is literally a second in the grand scheme of things). If they're behind us, it would mean that we're the first, hence we won't mean anyone until we discover them. If they're first, we would see the domination of their galaxy (if it's close enough to us). The first one makes it even more unlikely added to the other necessary things for life to begin (2 simultaneous life forms starting).