 Although persons are the paradigm objects of moral recognition respect, it is a matter of some debate whether they are the only things that we ought morally to respect. One serious objection raised against Kant’s ethical theory is that in claiming that only rational beings are ends in themselves deserving of respect, it licenses treating all things which aren’t persons as mere means to the ends of rational beings, and so it supports domination and exploitation of all nonpersons and the natural environment. Taking issue with the Kantian position that only persons are respect-worthy, many philosophers have argued that humans who are not agents or not yet agents, human embryos, nonhuman animals, sentient creatures, plants, species, all living things, biotic communities, the natural ecosystem of our planet, and even mountains, rocks, and viruses have (full or perhaps just partial) moral standing or worth and so are appropriate objects of or are owed moral recognition respect. Of course, it is possible to value such things instrumentally insofar as they serve human interests, but the idea is that such things matter morally and have a claim to respect in their own right, independently of their usefulness to humans.