Looking at Medieval Heresies

Over at Inside Catholic Father Longenecker reviews a book looking at the early Medieval Heresies. See Heretical Times .

In his review he says in part:
The medieval heresies differed from those of the early centuries by being critical of the established Church. As the medieval Church grew in power and wealth, the reform movements formed in backlash. The medieval heretics were concerned to bring the Church back to its original purity, and their subsequent heretical teachings were the result. The leaders of the reform movements called for extreme forms of personal holiness and rejected the growing wealth and corruption of the clergy. Their criticism of the Church invariably ended in fiery heretical beliefs, while their leaders invariably ended in the flames.

If you have watched the great movie that Sean Connery played in The Name of the Rose (based on the great book of that name) then you see that dynamic playing out. Sounds like a good read.