Even with Christianity aside, as you say, it's probably one of the greatest institutions of the West if not the world.
After the collapse of the Roman empire, the Church ran most of the great cities, maintaining civil authority during a period of great unrest.
The Churxh was the centre of learning and academics for centuries after thay even, educating people, maintaining records, keeping archives, and allowing Roman learning and writing to survive during the so-called "Dark Ages". Nor has that tradition died, Catholic schools are still to this day very good (often better than public government-run school), and many of the great universities today are from this tradition (such as Oxford or Cambridge).
During the past, the Church was also one of the great peacemakers of the past, heloing negotiating peace and creating & enforcing the earliest rules of war (eg. Cáin Adomnáin in Ireland), greatly reducing the amount horrors of war in the area.
Similar efforts can be seen in preventing civil unrest. While things like the Inquisitions are shamed today, compared to the mob 'justice' which preceded them they were relatively bloodless. The Church also pushed for legal reforms constantly, including today, with things like opposition to the death penalty.
already mentioned, the Church (both historically and currently) is one of the greatest charitable organisations of the world.
And such charity often mixed with the other above-mentioned goods. For instance, the great number of hospitals, homeless shelters, and other organizations that come from the mix of Catholic charity and their providing civic functions when the state would not.
And simply compare the Catholic world with the non-Catholic to tell. All the burnings and hangings of heretics belong to the Protestant world, like the Witch Hunts of the British colonies in America. As were the greatest cases of antisemetism, which is no surprise with Martin Luther writing "On the Jews and Their Lies". The destruction of the literary traditions claimed to have happened in the Dark Ages are only a reality in with the destruction of the Monasteries in England, compare the many great sagas of Ireland which survive in multple versions to the one copy of Beowulf that survived the Protestant's wrath. Christian bPost too long. Click here to view the full text.