Renewal, counter-attack, or both
Jedin’s double formulaUse Catholic Reformation for internal renewal and Counter-Reformation for the deliberate campaign against Protestantism. Most historians now use both terms; some prefer “early modern Catholicism” to escape the argument altogether. Place an item on the left to begin.
The test that matters. Trent’s doctrinal canons ended any realistic hope of reunion, but its administrative decrees are what actually changed Catholic life — seminaries, resident bishops, parish registers and a required public wedding reshaped ordinary experience far more than the anathemas did. The Tridentine framework then governed the Roman Church until the Second Vatican Council, four centuries later.