From a meeting and a solicitation with prof. Amleto Spicciani, the idea of a publication was born. The leitmotif of the work is represented by the figure of Toniolo who works for the unity of Catholics engaged in social and political issues between the end of the 800th century and the beginning of the 900th century. Having experienced the disintegration of the Christian Democrats after the "first Republic", having actively participated in the last social weeks that took place in Naples (1999), Bologna (2004), Pistoia and Pisa (2007) and Reggio Calabria ( 2010), prompted the author's sensitivity to live and grasp a certain underlying objective of the social weeks: the search for unity of all the components of Italian Catholicism. The thread of this idea can be traced back to Professor Garelli and to his affirmation at the Ecclesial Conference in Palermo (1995): "Let Catholics involved in politics come back to smell each other"; this provocation that left many food for thought. These and other considerations led Stefano Natali to take up his degree thesis again, propose it, revise it, but remaining as faithful as possible to the original text.