The first section of the poem (Lines 1-115) centers on the Muses, nine female divinities whose dances and songs praise the gods and inspire men to sing poetry. It is typical for ancient epics to open with an invocation of the Muses, but Hesiod’s one-on-one encounter with the goddesses on Mount Helikon is unusual and of great literary significance. It is the first surviving account of the initiation—or invention—of a poet. While Hesiod was previously a “hillbill[y],” a poor excuse for a shepherd (Line 27), the Muses breathe into him “a voice divine” (Line 33), transforming Hesiod from country bumpkin to eloquent artist. The resonance of this image—gods filling an artist’s lungs with divine power—is reflected in the English word “inspiration.” Derived from the Latin words in and spirare, a person who is “inspired” is, quite literally, “breathed into” by the gods. This stock scene of Hesiod’s life-changing encounter with the Muses would be much-imitated in antiquity and beyond.

After these lengthy preliminaries, Hesiod moves into the Theogony proper. In the beginning, he says, there was only one supernatural entity: “Chaos” (Line 116). While the English word carries connotations of disorder and strife, the Greek word just means “gap” or “chasm.” This first being is something of a paradox: it is not an individual, but rather an absence, a plot of open space in which the components of the universe can generate and expand.

Three other primordial gods follow. Next is Gaia, or Earth, the first mother figure of Greek myth. She is defined by her solidity (“the ever-firm foundation of all,” Line 118), an important characteristic for the mother of all beings. Significantly, the next god is not Gaia’s male counterpart, but Tartaros (Line 119). Tartaros will be used in later Greek literature as a synonym for the Underworld, the realm of Hades and final destination for mortal souls. In these early works, however—that is, in Hesiod and Homer—Tartaros usually refers to the open spaces deep within the earth, the subterranean abyss which divine kings will use to imprison their enemies.

Finally, the last of these four primordial beings is Eros, the personification of sexual desire (Line 120). Eros receives a longer description than the other three beings, reflecting his incredible power: He “makes [the Immortals’] bodies (and men’s bodies go limp / Mastering their minds and subduing their wills” (Lines 121-22). This innately threatening figure is a far cry from later mythological accounts of Eros and his Roman form, Cupid, which portray the god as a mischievous, fun-loving son of Ares and Aphrodite. Hesiod’s enhancement of Eros’s menacing side is in keeping with his distrust of women and their power to seduce men. He also spotlights Eros here to suggest that the drive to procreate is a foundational force in the cosmos, one which predates even the Olympian gods. Eros is necessary for what is to come: He encourages various beings to have sex, which will in turn populate the universe.

But Eros does not have a foothold yet; these early beings seem to be generated asexually, perhaps from Chaos (as with Erebos and Night, Line 123), perhaps independently. Gaia goes on to asexually (“without any sexual love,” Line 132) produce the first generation of children, including the Mountains (Line 129) and the universal sea, Pontus (Line 131).

The most important of Gaia’s children is Ouranos, the personified sky god. He is the only child to match his mother in vastness—he is “just [Gaia’s] size, a perfect fit on all sides” (Line 127). As the sky, he is in constant, enveloping contact with the earth. Their perpetual sexual union produces many new groups of gods, including the Cyclopes, the Hundred-Handers Kottos, Briareos, and Gyges (they will come into play again later as allies of Zeus, Lines 621-89), and one of the most important forces in the Theogony, the Titans.

Most of Ouranos and Gaia’s children are monstruous. Their power is matched only by their propensity for violence. Ouranos loathes them on sight and locks them away in Tartaros (Lines 140-59). But Gaia gives birth to 12 lovely Titans too, six male and six female, a number which matches (and foreshadows) the next generation, the Olympians. The Titans are defined by their massiveness. In contemporary works like Homer’s Iliad and Odyssey, size is a defining factor for these early generations. Even mortals were believed to be physically larger in the past. Each of the Titans has his or her own rich mythological history and domains of influence; Oceanus and Tethys, for example, parent freshwater deities, while Hyperion and Theia are associated with the heavenly bodies (their descendants include the sun god Helios, the moon goddess Selene, and the dawn goddess Eos).

Again, Hesiod focuses on the most important of the Titans: Kronos, Gaia’s youngest son. In Greek, Kronos means “time”; he is a figure who forces things to move along. His father, Ouranos, keeps things at a standstill by metaphorically refusing to disengage from sexual intercourse with Gaia. He is not only in constant sexual union with her; he forces the natural products of that union—their children—back inside. Life, in other words, cannot proceed as normal. It is only when Kronos severs his father’s genitals from within the “womb” that the sexual union of earth and sky, too, is severed: The two finally separate, creating the space between earth and sky for gods and mortals to inhabit.

Even after the castration, Ouranos’s procreative force is powerful. The drops of blood from his wound are absorbed by Gaia and produce one of Greek myths’ most infamous groups, the Furies, goddesses of vengeance who torment those who break oaths or betray their families (as, perhaps, is natural: The Furies themselves were born of interfamilial violence, Lines 184-85). The contact between Ouranos’s genitals and sea foam also produces Aphrodite, the goddess of sexual desire (primordial Eros, usually portrayed as her child, quickly allies with her, Line 201). Hesiod’s version of Aphrodite’s birth gives the goddess special power and significance. She predates the Olympians and carries all the potency of the sea. In Homer’s version, Aphrodite is just a child of Zeus and Hera.

Notably, Kronos succeeds Ouranos with tricks and bloodshed: The universe’s first transition of power is fueled by an act of violent, interfamilial betrayal. Paradoxically, Kronos becomes the first king of the cosmos by removing his father’s ability to sire children.

This cycle of successional violence rolls forward. Kronos fears a prophecy that his children will betray him too (Lines 467-71). He takes the first generation of Olympian deities—Hestia, Demeter, Hera, Hades, and Poseidon—from their mother Rheia as soon as they are born and swallows them. Only the youngest son, Zeus, escapes this fate, again, through the trickery of his mother. Like Gaia, Rheia resents her partner’s poor treatment and hides Zeus away on Crete until he can become an adult and take vengeance against his father. Zeus succeeds, forcing Kronos to regurgitate his siblings who, in turn, make him king.

With this act, Zeus violently wrests control of the universe from his father, as Kronos did to Ouranos before him. But the Titans are not content to be ruled by their descendants. One Titan, Prometheus, attempts to embarrass Zeus at a council of men and gods by tricking him into accepting an inferior cut of meat, but Zeus quickly discerns the truth. As punishment, Zeus withholds the gift of fire from mortals; when Prometheus gifts it to them anyways, Zeus chains him to a crag, where an eagle (Zeus’s signature bird) picks out his liver every day.

Zeus also inflicts another “punishment” on mankind: Women. Most versions of the Pandora myth mention her box of evils which are unleashed on the world, but for Hesiod, the introduction of women to society is punishment enough. In his telling, women are evil conspirators, lazy “layabouts” who mooch off their husbands even as they plot their demise. Hesiod’s misogyny here (and in his other major text, Works and Days) is an important foundation for misogyny in Greek society.

Prometheus’s playful attempts to subvert Zeus’s authority pale in comparison to those of his fellow Titans, who wage full out war on the younger generation (“Titanomachy” means “Titan Battle”). This war between Zeus’s Olympians (so named for their home on Mount Olympus) and the Titans continues for 10 years without a truce because neither side can overcome the other (“The war’s outcome [was] balanced between them,” Line 643). Notably, it is not Zeus’s superior military strength that allows him to defeat the Titans. It is his willingness to negotiate. On the recommendation of Gaia—who remains an important and influential figure, even this late in the narrative—Zeus releases and courts Ouranos’s forgotten children, the Hundred-Handers, whom he confined to Tartaros (see Lines 147-59).

After Zeus gives these monstruous beings a properly hospitable Greek reception—he feeds them and gives them “all that they needed” (Line 644)—they agree to be his allies. Zeus’s act of good kingship proves to be the decisive turning point of the war. The Hundred-Handers “stood against the Titans on the line of battle” (Line 677), allowing Zeus and Olympians to defeat them and imprison them in Tartaros. Hesiod details the Greeks’ vertically-oriented structure of the universe here: “A bronze anvil falling down from the sky,” he says, “Would fall nine days and nights and on the tenth hit earth. / It is just as far from earth down to misty Tartaros” (Lines 726-28). This concept of the Underworld being deep beneath the earth would strongly influence western mythology going forward.

After the Titanomachy, Zeus faces one final external challenge to his kingship: Gaia’s last child, the monster Typhoeus. Typhoeus is a walking natural disaster, spewing fire and making horrible, incomprehensible noises. He is, in sum, a personification of anti-civilization, a force which seeks only to upset the structure Zeus enacts on the cosmos. By crushing him in battle, Zeus completes the universe’s progression from chaos to order.

With Typhoeus defeated, Zeus must now deal with internal challenges, the brand of interfamilial succession event which defeated his ancestors, Ouranos and Kronos. As before, a prophecy dictates that Zeus will be overthrown by his son, the second child of his first wife, Metis (Lines 893-05). Again, Zeus proves to be wilier than his predecessors. Aware of the failures of his father and grandfather before him, Zeus breaks the mold: He does not stifle the children. Rather, he nips the problem at the source by swallowing the female element, their mother. In doing so, Metis becomes part of him, allowing Zeus to assume her sphere of influence: Cleverness (in Greek, Metis means “wisdom” or “skill”). Zeus also prevents the prophesied son from ever being born. Metis was pregnant, though, with their first child when Zeus swallowed her. This fetus is not born through natural means; rather, Athena bursts fully formed from Zeus’s skull. Thus Zeus not only takes on female cleverness by swallowing Metis—he even takes on the birthing role. This is how he defeats his fate and stops the generational power struggles of the early cosmos, completing the core narrative arc of the Theogony.