Who is the Greek goddess of discord and strife?

The Greek goddess of discord and strife is Eris.

Eris personifies conflict, quarrelling and the destructive strife associated with war. In Hesiod’s Theogony, she is the daughter of Nyx, the primordial goddess of Night, and the mother of personified troubles such as Toil, Famine, Pain, Battles and Lies. Homer’s Iliad presents her as a force that rouses armies rather than as a conventional warrior goddess.

Her most famous myth begins when she is excluded from the wedding of Peleus and Thetis. In revenge, she throws the golden Apple of Discord among Hera, Athena and Aphrodite, inscribed for “the fairest.” Their rivalry leads to the Judgment of Paris and eventually helps set the Trojan War in motion.

Eris is often confused with Nemesis, who represents retribution, or Nike, who represents victory. Her Roman counterpart is Discordia. The dwarf planet Eris, discovered in the 21st century, was named for her because its discovery helped provoke a debate over the definition of a planet.