The Breeds of Man
Giants were created to be hunted by the Ancients. They are large, powerful, and more cunning than they are often given credit for. They tend to use simple tools and build crude shelters mostly because their large size and lack of manual dexterity make it exceedingly difficult to perform fine work. They’re not stupid, though. At least, not those who are suffering from inbreeding due to a small population.
Giants tend to inhabit the lands closest to the blasted cities of the Ancients. They are large enough and strong enough to defend themselves from the aberrations and alien creatures which often find their way into the world from the ancient ruins. They have learned to breed some of the giant animals (normal animals transformed by their straying into the ancient ruins) for food, making life on the verge a bit less precarious.