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Elite Dangerous isn't a survival game, though.
In cannon, the third world war happends, and the US wins becoming "The Federation", and also, boss of the planet, basically.
And then, with the realisation that resources on Earth are running out, a surge of interest towards space happends, Mars gets colonized, and a handfull of "Generation ships" are send out to slow-boat their way to other star systems, but, painfully, before they are even halfway, the frameshift drive is invented and mankind can traverse from system to system in a matter of days.
A few hundred years later, and people are slowly starting to massively migrate to colonies in other planets and system, to such an extend that the capitol city of the Federation is moved from Earth to Mars.
Officially, Earth is later restored in it's full glory, and becomes a touristical attraction for very wealthy people.
But obviously, I'd rather not have that... :I