The Moon... was it put here on purpose?

[macrostheblack]

I think it was put here for some purpose long after earth came around. From what you read it appears to be a jump point from there to here. I think it was once part of the asteriod belt and was crafted and then moved here. I have read accounts from historians that the moon wasnt described/not here in distant times past. I now wonder - is there a single moon around other worlds that have life and are at out level of growth?