The signatories, who represent denominations and organizations ranging from Catholic to Quaker to Pentecostal, praise the deal’s technical provisions while also arguing its merits on moral grounds.

“As faith leaders from the only country that has ever used nuclear weapons in war, we have a particular responsibility to speak boldly when opportunities arise that lead to nuclear disarmament and non-proliferation at home and around the world,” the 51 faith leaders write. “This historic accord moves us one small step closer to a world free of nuclear weapons.”

The letter, which will be sent to lawmakers Tuesday, goes on: “This is a moment to remember the wisdom of Jesus who proclaimed from the Sermon on the Mount, ‘Blessed are the peacemakers, for they shall be called children of God’ (Matthew 5:9)… There is no question we are all better off with this deal than without it.”