What do you think would finally be their, “Enough, we gotta say something!” situation?
Edit:
Put another way, what might serve as a cosmic icebreaker?
What do you think would finally be their, “Enough, we gotta say something!” situation?
Edit:
Put another way, what might serve as a cosmic icebreaker?
Drop a couple nukes on planets in a predictable order with a predictable time in between. They’ll reach out sooner or later once we get close enough.