The major contributor to the theory of communicative reason and communicative rationality was:

Jürgen Habermas, (born June 18, 1929, Düsseldorf, Germany), the most important German philosopher of the second half of the 20th century.

Important Points

• In Habermas’ concept of communicative rationality, knowledge is given through the competence of dialogue, in the possibility of exchange, in giving to the other, with respect to the differences and sharing of the lifeworld present in the discussions about CT, since it is desirable that the student can identify the real meaning of elements and of these within a given context.
• In this aspect, the Communicative Action theory proposes to investigate the “reason” inscribed in everyday communicative practice and to reconstruct from the basis of validity of speech an unrestricted concept of reason, understood as the result of a learning, a social, communicative and dialogic evolution.
• Dialogical knowledge and communicative rationality are collective and organized. Participants exercise their existential right to speak their mind, in respect and dialogue with others; Visions of the world are shared and discussed, not imposed, in a process of collective construction..
• Habermas proposes some important concepts to define the theory of Communicative Action, among them moral conscience, communicative action, dialogic knowledge and communicative rationality.
• Theory of Communicative Action, from which the participants present their arguments; of universality, in the sense of an inclusion of all concepts; and of the reciprocity of equal recognition of the pretensions of each participant by all others.

Hence, we can conclude that the major contributor to the theory of communicative reason and communicative rationality was Habermas.