He spoke clearly and concisely about what he felt were the causes of the tragedy, his words uncoloured by emotion and without constant reference to the morals of the era.
In it he discusses arguments for and against paternalism (restrictions on the legal capacity to bargain) and perfectionism (the enforcement of morals).
The medieval world-view was unable to interpret these changes in terms of socio-economic development, and it became common to blame degrading morals instead.
