The story
A reference to the μῆλον τῆς Ἔριδος (mêlon tês Éridos, “apple of Eris”) in Greek mythology, a golden apple inscribed ‘for the fairest female’ which Eris (known as Discordia to the Romans), the goddess of discord and strife, tossed in the midst of the feast of the gods at the wedding of Thetis and Peleus. This provoked a dispute among Aphrodite, Athena, and Hera as to who was the most beautiful, and eventually led to the Trojan War.
Etymology from Wiktionary, CC BY-SA 4.0.