What is the main conflict in Riddley Walker by Russell Hoban?

Set in the ashes of a destroyed England, 2,000 years in the future after nuclear war has demolished civilization, the novel follows the narrator and protagonist, Riddley Walker, as he seeks to uncover truth and history. “Inland,” as Riddley’s world is now known, has been obliterated and mankind is slowly rebuilding civilization in what reflects the English Iron Age. Villagers hunt and gather as well as mine for iron ore from the remains of ancient machines from the “Bad Time.” Their folklore and mythology are taken from remnants of hist