"alien civilizations would need to network to forge a treaty to leave primitives, like us, in the cold" Or they just need to think alike, with no need for a co

"alien civilizations would need to network to forge a treaty to leave primitives, like us, in the cold" Or they just need to think alike, with no need for a complicated assumption that they forged some kind of treaty with each other. Maybe it's hard to see now, but in a space faring era with enough alien contact it might just come out as an obvious thing to not trust others too much and thus limit the exposure as the first measure of precaution.