Homecoming — Maquel A. Jacob

A newly terraformed Earth is ready for its population in cryochambers traveling on interstellar arks to return. There's one catch. The Arenans, a race of guardians charged with our sector in the galaxy, want to ensure humans do not venture too far outside our solar system. They feel we just aren't ready to meet the neighbors. With a new lease on their existence, humans will have to take a hard look in the mirror and vow to not make the same mistakes. But for some, old habits die hard.