Great Filter.

To go interstellar, you need very powerful energy generation and storage. The kind of tech that can do so can be easily repurposed into making really big bombs. Therefore, any potentially spacefaring civilization definitionally has access to at least nuclear scale weapons.

I believe the great filter is ‘can we use this technology to get off this rock before we use it to blow everyone up.’ Which, considering that our Cold War came dangerously close on several occasions, and we haven’t had them for that long, I don’t hold out much hope for ourselves or any other civilization.