To fully appreciate this work, he must already have assimilated very well the history as presented in textbooks. Good knowledge about the Middle Ages are absolutely necessary to understand the vision we offer the author this period. Indeed, it could be otherwise to enter the argument that Europe was born in the Middle Ages and why there is a long Middle Ages that lasted until the late eighteenth century to some historians! A very interesting aspect of this work is the number of pages devoted to explaining the Catholic religion and the impact that it had on everyday life. The author is well aware of addressing readers of different faiths or even an atheist public. Would that by the number of pages apparently deemed necessary, we imagine the distance between this old way of thinking and proven today by some readers! Yet these men and women of old are not from another world but are our ancestors who lived there are not too long ago ...