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Many major historical figures in philosophy have provided an answer to the question of what, if anything, makes life meaningful, although they typically have not put it in these terms. Consider, for instance, Aristotle on the human function, Aquinas on the beatific vision, and Kant on the highest good. While these concepts have some bearing on happiness and morality, they are straightforwardly construed as accounts of which final ends a person ought to realize in order to have a life that matters. Despite the venerable pedigree, it is only in the last 50 years or so that something approaching a distinct field on the meaning of life has been established in Anglo-American philosophy, and it is only in the last 30 years that debate with real depth has appeared. Concomitant with the demise of positivism and of utilitarianism in the post-war era has been the rise of analytical enquiry into non-hedonistic conceptions of value, including conceptions of meaning in life, grounded on relatively uncontroversial (but not certain or universally shared) judgments of cases, often called “intuitions.” English-speaking philosophers can be expected to continue to find life's meaning of interest as they increasingly realize that it is a distinct topic that admits of rational enquiry to no less a degree than more familiar ethical categories such as well-being, virtuous character, and right action.

This survey critically discusses approaches to meaning in life that are prominent in contemporary Anglo-American philosophical literature. To provide context, sometimes it mentions other texts, e.g., in Continental philosophy or from before the 20th century. However, the central aim is to acquaint the reader with recent analytic work on life's meaning and to pose questions about it that are currently worthy of consideration.

When the topic of the meaning of life comes up, people often pose one of two questions: “So, what is the meaning of life?” and “What are you talking about?” The literature can be divided in terms of which question it seeks to answer. This discussion starts off with works that address the latter, abstract question regarding the sense of talk of “life's meaning,” i.e., that aim to clarify what we are asking when we pose the question of what, if anything, makes life meaningful. Afterward, it considers texts that provide answers to the more substantive question about the nature of meaning as a property. Some accounts of what make life meaningful provide particular ways to do so, e.g., by making certain achievements (James 2005), developing moral character (Thomas 2005), or learning from relationships with family members (Velleman 2005). However, most recent discussions of meaning in life are attempts to capture in a single principle all the variegated conditions that can confer meaning on life. This survey focuses heavily on the articulation and evaluation of these theories of what would make life meaningful. It concludes by examining nihilist views that the conditions necessary for meaning in life do not obtain for any of us, i.e., that all our lives are meaningless.

1. The Meaning of “Meaning”

One part of the field of life's meaning consists of the systematic attempt to clarify what people mean when they ask in virtue of what life has meaning. This section addresses different accounts of the sense of talk of “life's meaning” (and of “significance,” “importance,” and other synonyms). A large majority of those writing on life's meaning deem talk of it centrally to indicate a positive final value that an individual's life can exhibit. That is, comparatively few believe either that a meaningful life is a merely neutral quality, or that what is of key interest is the meaning of the human species or universe as a whole (for discussions focused on the latter, see Edwards 1972; Munitz 1986; Seachris 2009). Most in the field have ultimately wanted to know whether and how the existence of one of us over time has meaning, a certain property that is desirable for its own sake.

Beyond drawing the distinction between the life of an individual and that of a whole, there has been very little discussion of life as the logical bearer of meaning. For instance, is the individual's life best understood biologically, qua human being, or instead as the existence of a person that may or may not be human (Flanagan 1996)? And if an individual is loved from afar, can it logically affect the meaningfulness of her “life” (Brogaard and Smith 2005, 449)?

Returning to topics on which there is consensus, most writing on meaning believe that it comes in degrees such that some periods of life are more meaningful than others and that some lives as a whole are more meaningful than others (perhaps contra Britton 1969, 192). Note that one can coherently hold the view that some people's lives are less meaningful than others, or even meaningless, and still maintain that people have an equal moral status. Consider a consequentialist view according to which each individual counts for one in virtue of having a capacity for a meaningful life (cf. Railton 1984), or a Kantian view that says that people have an intrinsic worth in virtue of their capacity for autonomous choices, where meaning is a function of the exercise of this capacity (Nozick 1974, ch. 3). On both views, morality could counsel an agent to help people with relatively meaningless lives, at least if the condition is not of their choosing.

Another uncontroversial element of the sense of “meaningfulness” is that it connotes a good that is conceptually distinct from happiness or rightness (something emphasized in Wolf 2010). First, to ask whether someone's life is meaningful is not one and the same as asking whether her life is happy or pleasant. A life in an experience or virtual reality machine could conceivably be happy but very few take it to be a prima facie candidate for meaningfulness (Nozick 1974: 42–45). Indeed, many would say that talk of “meaning” by definition excludes the possibility of it coming from time spent in an experience machine (although there have been a small handful who disagree and contend that a meaningful life just is a pleasant life. Goetz 2012, in particular, bites many bullets.) Furthermore, one's life logically could become meaningful precisely by sacrificing one's happiness, e.g., by helping others at the expense of one's self-interest.

Second, asking whether a person's existence is significant is not identical to considering whether she has been morally upright; there seem to be ways to enhance meaning that have nothing to do with morality, at least impartially conceived, for instance, making a scientific discovery.

Of course, one might argue that a life would be meaningless if (or even because) it were unhappy or immoral, particularly given Aristotelian conceptions of these disvalues. However, that is to posit a synthetic, substantive relationship between the concepts, and is far from indicating that speaking of “meaning in life” is analytically a matter of connoting ideas regarding happiness or rightness, which is what I am denying here. My point is that the question of what makes a life meaningful is conceptually distinct from the question of what makes a life happy or moral, even if it turns out that the best answer to the question of meaning appeals to an answer to one of these other evaluative questions.

If talk about meaning in life is not by definition talk about happiness or rightness, then what is it about? There is as yet no consensus in the field. One answer is that a meaningful life is one that by definition has achieved choice-worthy purposes (Nielsen 1964) or involves satisfaction upon having done so (Hepburn 1965; Wohlgennant 1981). However, for such an analysis to clearly demarcate meaningfulness from happiness, it would be useful to modify it to indicate which purposes are germane to the former. On this score, some suggest that conceptual candidates for grounding meaning are purposes that not only have a positive value, but also render a life coherent (Markus 2003), make it intelligible (Thomson 2003, 8–13), or transcend animal nature (Levy 2005).

Now, it might be that a focus on any kind of purpose is too narrow for ruling out the logical possibility that meaning could inhere in certain actions, experiences, states, or relationships that have not been adopted as ends and willed and that perhaps even could not be, e.g., being an immortal offshoot of an unconscious, spiritual force that grounds the physical universe, as in Hinduism. In addition, the above purpose-based analyses exclude as not being about life's meaning some of the most widely read texts that purport to be about it, namely, Jean-Paul Sartre's (1948) existentialist account of meaning being constituted by whatever one chooses, and Richard Taylor's (1970, ch. 18) discussion of Sisyphus being able to acquire meaning in his life merely by having his strongest desires satisfied. These are prima facie accounts of meaning in life, but do not essentially involve the attainment of purposes that foster coherence, intelligibility or transcendence.

The latter problem also faces the alternative suggestion that talk of “life's meaning” is not necessarily about purposes, but is rather just a matter of referring to goods that are qualitatively superior, worthy of love and devotion, and appropriately awed (Taylor 1989, ch. 1). It is implausible to think that these criteria are satisfied by subjectivist appeals to whatever choices one ends up making or to whichever desires happen to be strongest for a given person.

Although relatively few have addressed the question of whether there exists a single, primary sense of “life's meaning,” the inability to find one so far might suggest that none exists. In that case, it could be that the field is united in virtue of addressing certain overlapping but not equivalent ideas that have family resemblances (Metz 2013, ch. 2). Perhaps when we speak of “meaning in life,” we have in mind one or more of these related ideas: certain conditions that are worthy of great pride or admiration, values that warrant devotion and love, qualities that make a life intelligible, or ends apart from base pleasure that are particularly choice-worthy. Another possibility is that talk of “meaning in life” fails to exhibit even this degree of unity, and is instead a grab-bag of heterogenous ideas (Mawson 2010; Oakley 2010).

As the field reflects more on the sense of “life's meaning,” it should not only try to ascertain in what respect it admits of unity, but also try to differentiate the concept of life's meaning from other, closely related ideas. For instance, the concept of a worthwhile life is probably not identical to that of a meaningful one (Baier 1997, ch. 5; Metz 2012). For instance, one would not be conceptually confused to claim that a meaningless life full of animal pleasures would be worth living. Furthermore, it seems that talk of a “meaningless life” does not simply connote the concept of an absurd (Nagel 1970; Feinberg 1980), unreasonable (Baier 1997, ch. 5), futile (Trisel 2002), or wasted (Kamm 2003, 210–14) life.

Fortunately the field does not need an extremely precise analysis of the concept of life's meaning (or definition of the phrase “life's meaning”) in order to make progress on the substantive question of what life's meaning is. Knowing that meaningfulness analytically concerns a variable and gradient final good in a person's life that is conceptually distinct from happiness, rightness, and worthwhileness provides a certain amount of common ground. The rest of this discussion addresses attempts to theoretically capture the nature of this good.

2. Supernaturalism

Most English speaking philosophers writing on meaning in life are trying to develop and evaluate theories, i.e., fundamental and general principles that are meant to capture all the particular ways that a life could obtain meaning. These theories are standardly divided on a metaphysical basis, i.e., in terms of which kinds of properties are held to constitute the meaning. Supernaturalist theories are views that meaning in life must be constituted by a certain relationship with a spiritual realm. If God or a soul does not exist, or if they exist but one fails to have the right relationship with them, then supernaturalism—or the Western version of it (on which I focus)—entails that one's life is meaningless. In contrast, naturalist theories are views that meaning can obtain in a world as known solely by science. Here, although meaning could accrue from a divine realm, certain ways of living in a purely physical universe would be sufficient for it. Note that there is logical space for a non-naturalist theory that meaning is a function of abstract properties that are neither spiritual nor physical. However, only scant attention has been paid to this possibility in the Anglo-American literature (Williams 1999; Audi 2005).

Supernaturalist thinkers in the monotheistic tradition are usefully divided into those with God-centered views and soul-centered views. The former take some kind of connection with God (understood to be a spiritual person who is all-knowing, all-good, and all-powerful and who is the ground of the physical universe) to constitute meaning in life, even if one lacks a soul (construed as an immortal, spiritual substance). The latter deem having a soul and putting it into a certain state to be what makes life meaningful, even if God does not exist. Of course, many supernaturalists believe that certain relationships with God and a soul are jointly necessary and sufficient for a significant existence. However, the simpler view is common, and often arguments proffered for the more complex view fail to support it any more than the simpler view.

2.1 God-centered Views

The most widely held and influential God-based account of meaning in life is that one's existence is more significant, the better one fulfills a purpose God has assigned. The familiar idea is that God has a plan for the universe and that one's life is meaningful to the degree that one helps God realize this plan, perhaps in the particular way God wants one to do so (Affolter 2007). Fulfilling God's purpose by choice is the sole source of meaning, with the existence of an afterlife not necessary for it (Brown 1971; Levine 1987; Cottingham 2003). If a person failed to do what God intends him to do with his life, then, on the current view, his life would be meaningless.

What I call “purpose theorists” differ over what it is about God's purpose that makes it uniquely able to confer meaning on human lives. Some argue that God's purpose could be the sole source of invariant moral rules, where a lack of such would render our lives nonsensical (Craig 1994; Cottingham 2003). However, Euthyphro problems arguably plague this rationale; God's purpose for us must be of a particular sort for our lives to obtain meaning by fulfilling it (as is often pointed out, serving as food for intergalactic travelers won't do), which suggests that there is a standard external to God's purpose that determines what the content of God's purpose ought to be (but see Cottingham 2005, ch. 3). In addition, some critics argue that a universally applicable and binding moral code is not necessary for meaning in life, even if the act of helping others is (Ellin 1995, 327).

Other purpose theorists contend that having been created by God for a reason would be the only way that our lives could avoid being contingent (Craig 1994; cf. Haber 1997). But it is unclear whether God's arbitrary will would avoid contingency, or whether his non-arbitrary will would avoid contingency anymore than a deterministic physical world. Furthermore, the literature is still unclear what contingency is and why it is a deep problem. Still other purpose theorists maintain that our lives would have meaning only insofar as they were intentionally fashioned by a creator, thereby obtaining meaning of the sort that an art-object has (Gordon 1983). Here, though, freely choosing to do any particular thing would not be necessary for meaning, and everyone's life would have an equal degree of meaning, which are both counterintuitive implications (see Trisel 2012 for additional criticisms). Are all these objections sound? Is there a promising reason for thinking that fulfilling God's (as opposed to any human's) purpose is what constitutes meaning in life?

Not only does each of these versions of the purpose theory have specific problems, but they all face this shared objection: if God assigned us a purpose, then God would degrade us and thereby undercut the possibility of us obtaining meaning from fulfilling the purpose (Baier 1957, 118–20; Murphy 1982, 14–15; Singer 1996, 29). This objection goes back at least to Jean-Paul Sartre (1948, 45), and there are many replies to it in the literature that have yet to be assessed (e.g., Hepburn 1965, 271–73; Brown 1971, 20–21; Davis 1986, 155–56; Hanfling 1987, 45–46; Moreland 1987, 129; Walker 1989; Jacquette 2001, 20–21).