A Roman stop after a Catholic push
Roman Catholicism can seem to be a pairing of contradictions. It is both Catholic (inclusive, welcoming, absorbing) and yet at the same time it is Roman (centralised, hierarchical, institutional).
The former characteristic gives it its fluidity, the latter its rigidity. Certainly there are historical phases in which the Catholic prevailed over the Roman and there are different combinations in the way the two qualities are intertwined with each other.