The biggest injury to that “Great Leap Forward” towards an open, egalitarian, universalist society (to borrow Mao’s phrase and put it to much better use) was actually the shattering of Christendom. This came via the triple hammer blows of (1) the Black Death and the tremendous socio-economic upheaval it produced [now there was the pandemic of pandemics!], (2) the Reformation followed by the Wars of Religion, and (3) the Enlightenment, which, despite all its protestations to be the Age of the coming of the great light of emancipation from superstition, opened the doors wide to the tsunami called the French Revolution.
To retain an image of relevance among the new cultural (g)literati, the Popes of those decades adopted the trappings and aspirations of being Renaissance connoisseurs while lip-serving the role of spiritual guides. They hired the likes of Michelangelo and Raphael to embellish their monumental edifices. Some of the Renaissance Popes were so little concerned with spiritual matters that they allowed a corrupt Curia to run affairs like a Mafia while they used the huge Papal wealth to satisfy their appetites for art and less savoury things. They showed up for official functions and gave audiences to the select of the upper crust, but did little else as ‘Holy Fathers’.