Part 2 of my research paper for school... Do you think God's Government is the only solution to all mankind?

Ultimately yes. If by God's government you mean adherence to God's will by means of prayer and obedience to His precepts. However, who will define that? The Catholic Church has a hierarchy that must agree on these things and they've had a rough go of it for the past 2000 years and they still can't bring civilization to it's senses. So the difficulty for you is to prove pragmatic implementation without a human all-too-human dictator. You've got your work cut out for you. Offhand, I'd have to say it's impossible especially from a Christian point of view. Christ's followers were to turn their back on this world and carry their crosses. His kingdom is not of this world.

That is a tough one! I think it actually depends on your religious belief. If you read God's Holy Word, and believe in baptism and Christianity...then God's kingdom IS the only hope(After all, you can't deny the bible!).