Well, look at the theology of the Trinity. It was not rigidly defined for centuries until it was required in response to growing heresies. The inclusion of the Deuterocanonicals (or indeed the entire content of the OT) was not required until the heresy of the Reformation.
It sounds like we heretics are to some strange extent determining whether or not you define your theology, what books are included in your official canon, and whether or not you grow in your faith. Now granted, we organized because of your "heresy", but since then I don't know of many of our beliefs that are reactions to the Vatican. :)
More twisted repsonses! (see my last two posts regarding this trend). What's we you guys? Why all the deformations? Just to pick arguments?
It had nothing to do with heretics helping the Curch "grow" theologically. It's like an English phrase that someone new to the English language may use inappropriately (i.e. a double nagative). Something that is (or should be known) known to every English speaker suddenly has to be defined in order to preserve the correct usage from those who don't know the language and tend to corrupt it through their ignorance.
The Seven Councils proclaimed dogmatic statements in repsonse to inaccurate or outright erroneous, heretical teachings of various outside groups, specifically regarding the Holy Trinity and Christology.