>Why do vegans/vegetarians have to promote/preach their diet restrictions to everyone else? This is fundamentally the way we talk about morality - not as a mat

>Why do vegans/vegetarians have to promote/preach their diet restrictions to everyone else? This is fundamentally the way we talk about morality - not as a matter of attitude or personal preference, but as objective facts we believe are true. Whether any particular moral statement is true or false is what most people would question, not whether moral statements are in themselves motivating. In this way, most people seem to be (1) moral realists, (2) moral internalists. Assuming you're a moral realist, it's easy to understand why someone would "promote/preach" their diet restrictions on moral grounds - because morality, to the realist, is a matter of fact (either an "objective" morality, or a "relative" (to a culture, time, or place) one). The assumption, also, is that unlike other facts, moral facts are inherently motivating. To the moral realist, a statement like "eating meat is morally wrong" has a truth value, in the same way "the earth is spherical" or "the earth is flat" has a truth value. The moral internalist further states that this fact is enough to provide some motivation for action, so the statement "eating meat is morally wrong" necessarily implies and states to us that "one should not eat meat" - assuming there is no failure to motivate (as may the case with depressed people or people who face extreme exhaustion, or have some other mental malady).