How do we know that sin is the root of marital issues?

In the account of Adam and Eve, we see that sin entered the world through disobedience, resulting in immediate consequences for both their relationship with God and each other. Following their sin, they experienced shame, blame, and division, showcasing how sin disrupts harmony and unity in marriage. This truth is further reinforced by the reality that when individuals act out of self-interest or pride, conflicts arise. The root issue is sin, which distorts God's original design for peace and love within marital relationships.