Creating post-humans would threaten the sufficiency of being human as a basis for claiming natural rights

Other opponents of directed evolution extend the argument further. They acknowledge that post-humans may be capable of claiming the same natural rights as humans by virtue of their capacities, but argue that creating such a species would challenge the notion that being human is sufficient for claiming those rights, in the same ways that discovering rational extraterrestrials would. This, in turn, would potentially disenfranchise the humans, like infants or the mentally disabled, who cannot show