 Philosophers have approached the concept of respect with a variety of questions. (1) One set concerns the nature of respect, including (a) What sort of thing is respect? Philosophers have variously identified it as a mode of behavior, a form of treatment, a kind of valuing, a type of attention, a motive, an attitude, a feeling, a tribute, a principle, a duty, an entitlement, a moral virtue, an epistemic virtue: are any of these categories more central than others? (b) Are there different kinds of respect? If so, is any more basic than others? (c) Are there different levels or degrees of respect? (d) What are the distinctive elements of respect, or a specific kind of respect? What beliefs, attitudes, emotions, and motives does (a specific kind of) respect involve, and what ways of acting and forbearing to act express or constitute or are regulated by it? (e) To what other attitudes, actions, valuings, duties, etc., is respect (or a specific kind) similar, and with what does it contrast? In particular, how is respect similar to, different from, or connected with esteem, honor, love, awe, reverence, recognition, toleration, dignity, contempt, indifference, discounting, denigration, and so on? (2) A second set of questions concerns objects of respect, including (a)What sorts of things can be reasonably be said to warrant respect? (b) What are the bases or grounds for respect, i.e., the features of or facts about objects in virtue of which it is reasonable and perhaps obligatory to respect them? (c) Must every appropriate object always be respected? Can respect be forfeited, can lost respect be regained? (3) A third set of questions focuses on moral dimensions of respect, including (a) Are there moral requirements to respect certain types of objects, and, if so, what are the scope and grounds of such requirements? (b) Why is respect morally important? What, if anything, does it add to morality over and above the conduct, attitudes, and character traits required or encouraged by various moral principles or virtues? (c) What does respect entail morally for how we should treat one another in everyday interactions, for issues in specific contexts such as health care and the workplace, and for fraught issues such as abortion, racial and gender justice, and global inequality?