What does the buried giant symbolize?

The Book's Title -- "The Buried Giant"

While there is literally a buried giant that Axl and Beatrice try not to disturb as they make their way on their journey, the concept of the buried giant also represents the giant issue between the Saxons and the Britons that has been buried due to the collective loss of memory that affects the land. The fact that the land's inhabitants can't remember or agree on the past allows the Saxons and the Britons to live side by side in peace. Once the people's memories surface, the land will have to bear the consequences, which will not be good.