If we didn't have women in the world, there wouldn't be any social injustice anymore. Think about it.
All men would have to be gay. Sex changes and trannies wouldn't exist. Women wouldn't be able to be discriminated against. We wouldn't have to worry about things like teenage pregnancy. Young boys could fuck each other without any consequences.
^ Clonning is a really bad idea. Due to the current clonning methods a clone will always live a much shorter and harder live than the original one. (E.g. Dolly) However an asexual way could work out with artificial fertilisation.