The giants and the dragons were the two oldest species that still existed.
When the two Goddesses of Chaos and Order were on friendly terms, they hoped that this world wouldn't be so desolate. Countless species were born thanks to the dual influences of Chaos and Order.
Things from ancient times barely existed today—only countless epics and legends but as tales. At the very least, the Golden Races of Gold Elves, Metal Dragons, Angels, and Titan Giants had been the four strongest species in the world at the time. They were the victors of the first Holy War.
However, time was forever heartless. The descendants of these former rulers which had lost their crowns typically had it worse off than even commoners.