We already have a world without god. Seems to me, even if you believe in the Bible, he's been MIA for about 2000 years.
What would the world be like if everyone did not believe in god? Unfortunately, humans would still probably be fighting over land and other resources. They just wouldn't be able to use religion to get people all riled up. Contrary to religious people's opinion, atheism is not a moral viewpoint. The fact that a person believes in god or not does not make him/her a more or less moral person ON THAT BASIS. The fact that I care for others and consider myself a moral person does not stem from my atheism, but rather from the moral values that I believe in.
BTW, Tammy, would you still be a good person if at some point you hypothetically learned something that would make you realize that Jesus is as much a fairytale as Zeus and Hermes? Would you at once become a homicidal maniac just because you're no longer a Christian? I don't think so. That's why I don't think that you're a good person solely because you believe in Christ.