The Catholic belief that marriage is between one man and one woman remains unchanged. It is rooted in the universal teachings of the Church, which are informed by natural law, human reason, and the Gospel teachings of Jesus Christ.
Catholic teaching maintains that marriage’s essential public purpose is to help protect a child’s fundamental right to be known and cared for by his or her mom and dad, to whatever extent possible. Not all marriages have children, but all children have a mom and a dad. And while there are many types of valuable, loving relationships, marriage is more.
All citizens should care about the government’s treatment and definition of marriage because civil authorities are charged with promoting the well-being of children and the broader common good, and marriage is indispensable for both purposes.