Photo Illustration by The Daily Beast / Alamy / GettyWith new probes, telescopes, and radio antennae, scientists are intensifying their search for alien civilizations. But it’s possible human civilization isn’t ready to meet extraterrestrials.There’s no global plan (at least, that the public knows of). No consensus among spacefaring countries on how we should follow up on first contact with an alien civilization. No treaty compelling Earth governments to behave properly toward our new extraterre