Religious dialogue
The attitude that Habermas has shown towards religion has changed throughout the years. Analyst Phillippe Portier identifies three phases in Habermas' attitude towards this social sphere: the first, in the decade of 1980, when the younger Jürgen, in the spirit of Marx, argued against religion seeing it as an "allineating reality" and "control tool"; the second phase, from the mid-1980s to the beginning of the 21st Century, when he stopped discussing it and, as a secular commentator, relegated it to matters of private life; and the third, from then until now, when Habermas has recognized the positive social role of religion.[36]
In an interview in 1999 Habermas had stated:
For the normative self-understanding of modernity, Christianity has functioned as more than just a precursor or catalyst. Universalistic egalitarianism, from which sprang the ideals of freedom and a collective life in solidarity, the autonomous conduct of life and emancipation, the individual morality of conscience, human rights and democracy, is the direct legacy of the Judaic ethic of justice and the Christian ethic of love. This legacy, substantially unchanged, has been the object of a continual critical reappropriation and reinterpretation. Up to this very day there is no alternative to it. And in light of the current challenges of a post-national constellation, we must draw sustenance now, as in the past, from this substance. Everything else is idle postmodern talk.[37][38][39][40]
In "Time of Transitions" (2004), Habermas referred to Christianity as the foundation of the most positive ethical values:[41]
"Christianity, and nothing else, is the ultimate foundation of liberty, conscience, human rights, and democracy, the benchmarks of Western civilization. To this day, we have no other options. We continue to nourish ourselves from this source. Everything else is postmodern chatter."[42]
In his book Zwischen Naturalismus und Religión (Between naturalism and Religion, 2005), Habermas stated that the forces of religious strength, as a result of multiculturalism and immigration, are stronger than in previous decades, and, therefore, there is a need of tolerance which must be understood as a two-way street: secular people need to tolerate the role of religious people in the public square and vice versa;[43][44]
In early 2007, Ignatius Press published a dialogue between Habermas and the then Prefect of the Congregation for the Doctrine of the Faith of the Holy Office Joseph Ratzinger (elected as Pope Benedict XVI in 2005), entitled The Dialectics of Secularization. The dialogue took place on January 14, 2004 after an invitation to both thinkers by the Catholic Academy of Bavaria in Munich.[45] It addressed contemporary questions such as:
Is a public culture of reason and ordered liberty possible in our post-metaphysical age?
Is philosophy permanently cut adrift from its grounding in being and anthropology?
Does this decline of rationality signal an opportunity or a deep crisis for religion itself?
In this debate a shift of Habermas became evident—in particular, his rethinking of the public role of religion. Habermas stated that he wrote as a "methodological atheist," which means that when doing philosophy or social science, he presumed nothing about particular religious beliefs. Yet while writing from this perspective his evolving position towards the role of religion in society led him to some challenging questions, and as a result conceding some ground in his dialogue with the Pope, that would seem to have consequences which further complicated the positions he holds about a communicative rational solution to the problems of modernity. Habermas believes that even for self-identified liberal thinkers, "to exclude religious voices from the public square is highly illiberal."[46]
Though in the first period of his career he begun as an skeptic of any social usefulness of religion, he now believes there is social role and utilitarian moral strength religion, and notably, that there is a necessity of Judeochristian ethics in culture.[47]
In addition, Habermas has popularized the concept of "post-secular" society, to refer to current times in which the idea of modernity is perceived as unsuccessful and at times, morally failed, so that, rather than a stratification or separation, a new peaceful dialogue and coexistence between faith and reason must be sought in order to learn mutually