Philosophical pessimism is a philosophical school that is critical of existence, emphasizing the inherent suffering and futility of life. This perspective can be traced back to various religious traditions and philosophical writings throughout history. Pessimism, in this context, is not merely a negative psychological outlook, but a philosophical stance that questions the fundamental value or worth of existence.

Notable early expressions of pessimistic thought can be found in the works of ancient philosophers such as Hegesias of Cyrene, who lived in Greece during the 3rd century BCE and was known for his teachings on the benefits of suicide. In the Eastern philosophical tradition, the Indian texts of Buddhism, particularly the Four Noble Truths, which acknowledge the existence of suffering (duḥkha) as a fundamental aspect of life, also reflect a pessimistic worldview. These early expressions laid the groundwork for more systematic and articulated forms of pessimism that would emerge later.

The modern discourse on philosophical pessimism is significantly shaped by the German philosopher Arthur Schopenhauer. Schopenhauer's ideas in the 19th century articulated a systematic critique of philosophical optimism, which had dominated Western thought since the Enlightenment, particularly with figures such as Gottfried Wilhelm Leibniz and Alexander Pope.

Schopenhauer's seminal work, "The World as Will and Representation," presents a grim view of existence, arguing that reality is driven by an insatiable and ceaseless metaphysical force which he called Will (which manifests in living creatures as the will to life — or the instinct of self-preservation), and that the world is thus fundamentally a place of perpetual suffering and dissatisfaction. His pessimistic philosophy has had a profound impact on subsequent thinkers, artists, scientists, and many others; and continues to influence contemporary discussions on the meaning and value of life.

Following Schopenhauer, subsequent thinkers such as Emil Cioran and David Benatar further developed pessimistic thought and challenged optimistic stances. Emil Cioran, a 20th-century Romanian philosopher and essayist, is known for his bleak reflections on the human condition. His works, such as "On the Heights of Despair," explore themes such as existence as an exile, the torment of self-awareness, and scorn for metaphysical systems and religious consolations — all expressed with an intensely lyrical tone. David Benatar, a contemporary South African philosopher, has further contributed to the modern discourse on pessimism through his books "Better Never to Have Been: The Harm of Coming into Existence" and The Human Predicament: A Candid Guide to Life's Biggest Questions". Benatar argues that coming into existence is always a net harm because it subjects individuals to a life filled with suffering and pain, even if it also contains moments of pleasure.

In religion Buddhism

Historically, philosophical pessimism seems to have first presented itself in the East, under the partly religious aspect of Buddhism. In the Dhammacakkappavattana Sutta, Gautama Buddha establishes the first noble truth of duḥkha, or suffering, as the fundamental mark of existence:Dhammacakkappavattana Sutta, translated from the Pali version by Bhikkhu Bodhi.

Now this, bhikkhus, is the noble truth of suffering: birth is suffering, aging is suffering, illness is suffering, death is suffering; union with what is displeasing is suffering; separation from what is pleasing is suffering; not to get what one wants is suffering; in brief, the five aggregates subject to clinging are suffering.

This would have exerted a certain influence on Greco-Roman philosophy from the Ptolemaic period onwards, in particular on the pessimistic doctrine of Hegesias of Cyrene. This thesis is notably advanced by Jean-Marie Guyau, who in the middle of the controversy about German pessimism (1870–1890) detects in Hegesias's philosophy the pessimistic theme of Buddhism, which he sees as a "palliative of life"; he summarizes it as follows:

Most often, hope brings with it disappointment, enjoyment produces satiety and disgust; in life, the sum of sorrows is greater than that of pleasures; to seek happiness, or only pleasure, is therefore vain and contradictory, since in reality, one will always find a surplus of sorrows; what one must tend to is only to avoid sorrow; now, in order to feel less sorrow, there is only one way: to make oneself indifferent to the pleasures themselves and to what produces them, to blunt sensitivity, to annihilate desire. Indifference, renunciation, here is thus the only palliative of life.

Judaism and Christianity

The Ecclesiastes is a piece of wisdom literature from the Old Testament. In chapter 1, the author expresses his view towards the vanity (or meaninglessness) of human endeavors in life.

Death is a major component of the author's pessimism. Though he views wisdom as more valuable than folly, death essentially vitiates its superiority, and because of this the author comes to abhor life.

In chapter 4, the author also expresses antinatalistic thoughts; articulating that, better than those who are already dead, is he who has not yet been born.

Some parallels have been made between the Book of Ecclesiastes and an ancient Mesopotamian literary composition named the Dialogue of Pessimism, composed around 1500 BCE in ancient Mesopotamia. Taking the form of a dialogue between a master and slave, the master in the exchange cannot decide on any course of action, giving orders to his slave before immediately cancelling them and driving him to the point of desperation, which has been interpreted as an expression of the futility of human actions.

In the Bible, Jesus sometimes showed doubts about the value of the world, for example, in the Gospel of John: "If you belonged to the world, the world would love you as its own. Because you do not belong to the world, but I have chosen you out of the world—therefore the world hates you."

Gnosticism Gnosticism is a complex religious movement steeped in Greco-Latin philosophy, most often claiming to be "true" Christianity, although it is considered heretical by Christian churches. It is characterized by a philosophy of salvation based on "gnosis" (spiritual knowledge), in other words on the knowledge of the divine, and by its denigration of the earthly world, created by an evil power. In general, the gnostic considers his body negatively: it is the "prison", the "tomb", or the "corpse" where his authentic self has been locked up. It is a foreign thing that must be endured, an "unwanted companion" or an "intruder" that drags the spirit down, plunging it into the degrading oblivion of its origin. The flesh is interpreted in this sense as a state of humiliation and suffering engendered by a demonic force, perverted or weakened, lurking in matter. This state condemns all men to live in a kind of hell which is none other than the sensible world. The pessimistic vision of the Gnostics extends to all the cosmos, conceived as a failed work, even fatal or criminal. Man is "thrown" into it, then locked up without hope.

In Gnostic thought, the problem of evil is a nagging question which leads to the adoption of a dualistic perspective. Indeed, the gnostic is led either to oppose God and the spirit to matter or to an evil principle, or else to distinguish from the transcendent God, unknown or foreign to the world and absolutely good, an inferior or malevolent god, creator of the world and of bodies. In this last case, the divine, rejected entirely out of the sensible, only remains in the "luminous" part of the human soul, extinguished however in the great majority of men. In addition to affirming the intrinsically evil character of the world, the Gnostic conceives it as hermetically sealed, surrounded by "outer darkness", by a "great sea" or by an "iron wall" identified with the firmament. Not only is it fortified against God, but God himself has been forced to fortify himself against the world's reach. Inexorable barriers thus oppose the escape of the soul from the earthly realm.

Inhabited by the feeling of being a stranger to the world, where he has been made to fall, the gnostic discovers that he is in essence a native of a beyond, although his body and his lower passions belong to this world. He then understands that he is of the race (genos) of the chosen ones, superior and "hypercosmic" beings. If he desperately yearns for an afterlife, it is because he experiences within himself a throbbing nostalgia for the original homeland from which he has fallen. This longing affects the upper part of his soul, which is a divine principle in exile here on earth, and which can only be saved by the recognition of its original origin—gnosis proper. Those whose higher part of the soul has remained extinct, or who are devoid of it, that is to say, all the individuals whom the Gnostics call hylics (the majority of human beings and all animals), are condemned to destruction or to wander in this world, undergoing the terrifying cycle of reincarnations.

Ancient Greece

Hegesias of Cyrene Hegesias of Cyrene was a Greek philosopher born in Cyrene, Libya, around the year 290 BC. He came from the dual Socratic and hedonistic tradition of the Cyrenaic school, but is clearly distinguished from it by the radical philosophical pessimism attributed to him. All his writings have been lost and we only know of his philosophy through what Diogenes Laërtius says about him, who considered him as "the advocate of suicide". Laërtius first lends to Hegesias the explicit affirmation of the impossibility of happiness: like later philosophical pessimists, Hegesias argued that lasting happiness is impossible to achieve and that all we can do is to try to avoid pain as much as possible:

Complete happiness cannot possibly exist; for that the body is full of many sensations, and that the mind sympathizes with the body, and is troubled when that is troubled, and also that fortune prevents many things which we cherished in anticipation; so that for all these reasons, perfect happiness eludes our grasp.

Hegesias held that all external objects, events, and actions are indifferent to the wise man, even death: "for the foolish person it is expedient to live, but to the wise person it is a matter of indifference". According to Cicero, Hegesias wrote a book called Death by Starvation (Greek: ἀποκαρτερῶν), which supposedly persuaded many people that death was more desirable than life – consequently earning him the nickname Death-persuader (Greek: πεισιθάνατος). Because of this, Ptolemy II Philadelphus banned Hegesias from teaching in Alexandria.

Middle Ages Al-Ma'arri and Omar Khayyam are two medieval writers noted for their expression of a philosophically pessimistic worldview in their poetry. Al-Ma'arri held an antinatalist view, in line with his pessimism, arguing that children should not be born to spare them of the pains and suffering of life. Khayyam echoes this sentiment, suggesting that happiness lies in not being born at all. Al-Ma'arri's personal experiences, including his sightlessness and the philosophical influences of his time, further shaped his outlook on life.

In contrast, Omar Khayyam, while also expressing pessimistic sentiments, sometimes intersperses his reflections with moments of hedonistic celebration. Khayyam's early loss of his father and the subsequent hardships he experienced contributed to his pessimism, as did his awareness of the decline of intellectual and scientific achievements in the Islamic world at the time.