 A consensus is emerging that analyses of the concept of gratitude should be concerned only with the phenomenon expressed by the prepositional sense of the term (Carr 2013; Gulliford, Morgan et al. 2013; Manela 2016a; Roberts and Telech 2019). The consensus is based on the observation that the propositional sense of “gratitude” is more or less identical to another concept: the concept called appreciation or gladness. To say that I am grateful that it did not rain on my wedding day, for instance, is just to say that I am glad it did not. To say that I am grateful that my cancer went into remission is just to say I am glad that it did and that I appreciate the extra life and health that state of affairs entails. By contrast, to say I am grateful to a good Samaritan for saving my life implies more than that I am glad, or appreciate the fact, that I was saved by her. To be grateful to such a person seems to imply, for instance, a desire to see her fare well, or a commitment to helping her out in the future, should she ever find herself in dire circumstances. (Other ways in which appreciation and gratitude are different can be found in  section 3.)  As the good Samaritan case suggests, prepositional gratitude and appreciation are called for in many of the same situations. Indeed, appreciation may be called for in every situation in which prepositional gratitude is called for. But as the earlier examples suggested, there are times when appreciation is called for but gratitude is not. Insofar as philosophers are interested in analyzing gratitude proper, without having their analyses contaminated by such cases of mere or bare appreciation, they should focus their attention on all and only instances of the essentially interpersonal kind of gratitude—instances where a beneficiary is grateful to a benefactor for something she did. In keeping with this emerging consensus, the remaining sections of this entry will be concerned only with the concept of prepositional gratitude: the response called for in a beneficiary to a benefactor’s having done something beneficent for him.