FIRST: Gold age - before Zeus. Men were content at home, had no towns with moats and walls around them, no alarms. People were un-aggressive, un-anxious living in peace, eternal Spring. Lived like gods -- no trouble or labor.
SECOND: Silver - Under Zeus. Slightly worse than gold. Men built houses and plant seeds. This race of man is dumb, refuse to honor the gods with sacrifice and couldn't hold back violence.
THIRD: Bronze - dispositions took on aggressive instincts, quick to arm, yet not entirely evil.
FOURTH: Iron. Base vein let loose all evil. Modesty, truth, and righteousness fled earth and trickery, plotting, violence took over. Hesiod has an in-between category before this that is "race of heroes" in which people are god-like (where Oedipus, Cadmus, Trojan Wart people fit).
Then Zeus causes the flood and FIFTH comes about. Men separate from gods -> Age of Ovid (Ovid's people come from stones, sons of Deucalion and Pyrrha but not via conception but rather a link with the earth. People are born from and tied to the earth