The moon DID hit us in the early stages of our planet's formation!!!! That is what gave us a strong magnetic field and a stable orbit and weather that is predictable and benign. As a consequence of that collision, the moon is gradually moving away from the earth and will eventually be lost into space. It is moving away from us at about an inch a year.
The moon was created when the earth was hit by another planet the size of mars,it was not a direct hit, it was a glancing blow, material from the earth and the other planet was throw into orbit around the remaining earth.this material came together to form the moon. The moon has been moving away from us ever since.it has never hit us and never will.
The moon will never hit the Earth. Gravity doesn't work the way we think it does. In space there is not actually zero gravity. If you are in the Space Station in space you are actually moving hundreds of thousands of miles per hour. Instead of floating in space around Earth, you are actually falling. You fall at an angle around Earth, but that doesn't mean that the Earth has no gravitational pull. The Earth's pull is keeping us a steady length away from it. The explanation I gave explains why orbits around the sun or Earth are not a perfect circle, but are oval shaped. The Earth or Sun's job is just to keep you from floating out into space. So, the only reasonable way of the moon hitting us is if a meteor or comet hits the surface, and big enough pieces get chipped of the moon that it survives our mesosphere. Note: I know a lot about space :)