In the current dispersal of social sciences related to their hyper-specialization, such an attempt (humanist) is to be welcomed, even if a more detailed analysis of the phenomena he describes some angles will yield different results (but losing in wide perspective what it gains in accuracy).
The scope of the phenomena realizes analysis Gauchet does not diminish in my opinion the depth of view.
Of course we must be critical of such an intellectual in-view and influential, but the arguments for most "ad hominem" or on points of detail, the other reviews do not do justice to such a book.