Abstract

Typically, discussions of well-being focus almost exclusively on the positive aspects of well-being, those elements which directly contribute to a life going well, or better. It is generally assumed, without comment, that there is no need to explicitly discuss ill-being as well—that is, the part of the theory of well-being that specifies the elements which directly contribute to a life going badly, or less well—since (or so it is thought) this raises no special difficulties or problems. But this common assumption is a mistake, since it is far from obvious how to extend even familiar theories of well-being so as to explicitly cover ill-being as well. This paper acts as an introduction to ill-being, noting some of the interesting and overlooked problems ill-being raises for qualitative hedonism, preference theory, and objective list theories. Particular attention is paid, by way of illustration, to the claim that knowledge is an objective good. Assuming this is so, what exactly is the opposite of knowledge, the objective bad which lowers one’s well-being in the same way that knowledge raises it?