Zeus saw it and had pity and in his wise heart resolved to relieve the all-nurturing earth of men by causing the great struggle of the Ilian war, that the load of death might empty the world.
This passage, drawn from the Cyprian tradition preserved in Hesiod, presents the Trojan War as a deliberate cosmological act of Zeus to reduce the over-population of demigods and re-establish the separation between mortal and immortal.
, Hesiod, the Homeric Hymns, and Homerica, -700thesis