Abstract
This paper is an attempt to undermine a basic assumption of theories of well-being, one that I call well-being invariabilism. I argue that much of what makes existing theories of well-being inadequate stems from the invariabilist assumption. After distinguishing and explaining well-being invariabilism and well-being variabilism, I show that the most widely-held theories of well-being—hedonism, desire-satisfaction, and pluralist objective-list theories—presuppose invariabilism and that a large class of the objections to them arise because of it. My aim is to show that abandoning invariabilism and adopting variabilism is a sensible first step for those aiming to formulate more plausible theories of well-being. After considering objections to my argument, I explain what a variabilist theory of well-being would be like and show that well-being variabilism need not be any threat to the project of formulating theories of well-being that deliver general principles concerning well-being enhancement.