This week I’ve read Larry Niven’s Footfall and watched Spielberg’s War of the worlds, and I was thinking, in reality, mankind wouldn’t have much of a chance against alien invaders with the technology to move between the stars and the ultimate strategic high ground.
Anyway, in order to make a discussion of this, super advanced defence satelites from a long-dead ancient civilisation orbit most lifebearing planets, including Earth which neutralise all forms of orbital bombardment. Automatic inteligence gathering over an Alien world triggers them and in the year 2012, they give the UN general a superduperly-convincing recorded message imploring them to ready Earth for a alien invasion in 30 years.
What can Earth do to prepare?
What would be the best outcome for the people of Earth?
Earth has no knowledge about the incoming threat beyond speculation and theorising.