The most poignant argument in favor of human cloning would be to help couples who cannot conceive a child naturally. There are many couples in this world which one or both individuals cannot pass on their genes for the purpose of procreation. Human cloning would give them a chance to give birth to a child that is genetically related to them. This way the parents can be assured that their genes will be passed on to future generations. Human cloning could also help find a cure for diseases such as cancer.
Cancer cells develop at approximately the same phenomenal speed as embryonic cells do.
By studying the embryonic cell growth scientist may be able to learn how to stop it, and stop cancer growth in turn. Human cloning could also help bring back bloodlines that were lost in history. The millions that were lost in Nazi concentration camps could be cloned to recover lost genetic strains. This would offer the Jewish community a constructive response to the Holocaust. It could also help recreate notable figures in history.