The book touches on many subject, to show their positioning, their interactions and their roles. It may not, however, elaborate on each of them. Yet no one else had really harnessed to this synthesis to scientifically show the vital elements necessary to return to intensive agriculture by putting square at a sustainable agriculture and agricultural independent of fossil energy. A farming where man has to know and to think, to reappropriate wisdom and values. Their interventions in movies, lectures, documentaries and interview are all additional explanations to also seek.