My teacher, mentor, and friend writing in the NY Times on the fiftieth anniversary of the opening of the Council:
The bishops at Vatican II felt that more than a century of centralization needed to be tempered. But in their euphoria, they failed to reckon sufficiently with the resistance of entrenched bureaucracies — jealous of their authority and fearful of disorder — to change. A more participatory mode of church life took hold for 15 years or so after the council, but from on high it began to be more and more restricted, to the point that central control is now tighter than ever.
And in the long historical perspective of Catholicism:
The post-Vatican II church was not a different church. But if you take the long view, it seems to me incontestable that the turn was big, even if failures in implementation have made it less big in certain areas than the council intended.
I wrote about O’Malley’s What Happened at Vatican II here.