I think plenty of things go wrong all the time to earth, and certainly in the "early years" when the planet was still being bombarded by astronomical bodies. For instance, a large asteroid hits the earth and wipes out the dinosaurs. Still, small mammals live and continue on. If you go further back, and believe in the proto-earth theory, where a water earth was hit by a Mars size protoplanet, and viola, Earth as we know it was created, now with the addition, and so very important--Moon.
It does not take much for life to get going, since life itself comes from the stars that make up the known universe. Now, if you are going to stick to fundamental religious beliefs, this may not be the best topic for you.