What is the main conflict in The Devil All the Time by Donald Ray Pollock?

This novel interweaves several narrative lines in a story that travels through some of the darkest tunnels of the human experience but at the end offers a glimpse of light. Pollock questions the validity of God and faith and portrays the corruptive power of sex and desire. The work also explores the nature and power of evil, the true nature and meaning of justice, and the nature of redemption.