I don't of the earth as one organism. I think of it as lots of seperate bits. Maybe it's just my head that can't get around the diversity of all living things.

Before we had male/female everything did reproduce asexually. When male and female appeared, evolution exploded because of the mixing up of genetic material - before this evolution was very slow as you might imagine when something is reproducing asexually - these were clones right?

Wouldn't it be a bit backward for us to get rid of male/female again? Asexual reproduction makes us more vulnerable to diseases and genetic cock ups...