|James Jacobs Creative Director|
The most random thought occurred to me while reading Gilgamesh for a literature class: would it be ridiculous to assume that the Dominion of the Black is aware of Earth? What's stopping them from just taking over the planet? Since Golarion has deities with an active interest in it for various reasons, while Earth's deities can't directly interact with their followers because magic and the supernatural are all but gone on the world itself (my headcanon explanation without stepping on eggshells regarding real life religions).
It's not ridiculous at all to assume the Dominion of the Black isn't aware of Earth. What would stop them is time... the Dominion doesn't have access to faster than light travel, and that combined with their patience and strange way of looking at time (the dominion isn't rushed by it) means that they may be on their way... but they're not here yet!
Anyway... the version of Earth in Golarion canon is NOT the same as real-world Earth. There are plenty of things that real-world Earth can dredge up to defend itself from aliens.