What metaphors are used in The Drowned and the Saved by Primo Levi?

Truth is a metaphor for politics and the twisting of reality. In his political manifesto, Mein Kampf , written years before coming to power, Adolf Hitler tells what he plans to do: drive eastward for land, stifle the worker movement, annihilate Bolshevism and Judaism, control Europe and share world power with England and the United States, and eliminate the mentally ill, and "useless mouths."