Personally, I believe that human clones were abandoned, technology wise, due to possible ethics arguments. For instance: A rich enough person could grow their own clone for X amount of years and harvest organs along the way. Legal, illegal or somewhere in-between? (Realize eventually the government would step in and either outlaw or tax this "ability" to "death.") Ethically speaking, this scenario is an absolute nightmare. People could possibly take to the streets and protest worse than pro life/pro baby murder. (Abortion is only murder if the baby is White. We all have our own opinions, just sharing mine.) Not saying the likes of the rich like Bill Gates haven't been doing this for years, already. I'd assume they would keep this like nuclear codes state secrets.