If you don't believe we evolved from monkeys/apes, how about a more recent ancestor like homo erectus?

Evolution has taken billions of years and we are a product of a long line of mutations and adaptations. We are an enormous cluster of cells that have collectively reflected upon ourselves unlike any other species known, monkeys and apes branched off the common ancestor around a few million years before we did, the common ancestor is listed here http://en.wikipedia.org/wiki/Timeline_of_human_evolution