Berserkers: The Galaxy is filled with killer robots looking for signals. ET is keeping low. Problem: where are the berserkers coming after us?
That's the Borg - they aren't here yet.
Nope. Berserkers were Fred Saberhagen's idea.
But they are. There's a possible political explanation for the Fermi Paradox. Every intelligent civilization has their bad eggs, who go on to push an inhibiting culture on the masses and cause extinction before a viable space traveling civilization can take root. On Earth, that inhibiting culture is Islam. They ain't just on Earth, folks, resistance is futile...