There are the same reasons for the recognition by human beings of ethical relations to non-human beings as there are for the recognition by human beings of ethical relations among themselves Analyse the reasons for being considerate toward men, any variety of men, and you will find the same reasons to exist for being considerate toward all men. And analyse the reasons for being altruistic toward men—for being kind and sympathetic toward them—and you will find the same reasons to exist for being altruistic toward those who are not men. The doctrine that we human beings may perform upon the other inhabitants of the earth all sorts of injurious acts, and that these acts when so performed by us are perfectly right and proper, but that these same things when done by others to us are crimes, is the logic of pure brutalitarianism. It is a doctrine utterly without intelligence, at variance with every sentiment of justice and humanity, and has no legitimate existence outside the fibrous brains of ruffians. _Right_ and _wrong_ are qualities belonging to two diverse kinds of conduct. They are the qualities which render conduct respectively proper and improper. All terrestrial races (unless the very lowest) have the power of experiencing two kinds of conscious states—the desirable (pleasurable) and the undesirable (painful). Now, if beings were indifferent as to what sort of conscious states entered into and made up their experiences, there would manifestly be no such thing as propriety and impropriety in the causing of these states. But they are not indifferent. The pleasurable experiences are the experiences all beings are seeking, and the painful ones are the ones they are all seeking to avoid. Those acts which help or tend to help beings to those experiences for which they are striving are, therefore, right and proper, and are, they and their authors, called _good_. While those acts which compel beings to undergo that which they are striving to avoid are improper and wrong, and are, they and their authors, called _bad_. Kindness, courtesy, justice, mercy, generosity, sympathy, love, and the like, are good, and selfishness, cruelty, deceit, pillage, injustice, and murder, are bad, because they are respectively the promoters and destroyers of wellbeing and happiness in the world.