What does say that we live in a secular age? Almost all agree that in a sense is, at least in the West. And it is clear that the place of religion in our society has changed profoundly in recent centuries. In what will be a defining book for our time, Charles Taylor addresses the question of what these changes, more specifically, what happens when a society where it is virtually impossible not to believe in God becomes a society faith, even for the staunchest believer, is just one human possibility among others. Taylor, long one of our sharpest thinkers, offers a historical perspective. Examines the development, in the "Western Christendom" those aspects of modernity we call secular. Actually, it does not describe a single and continuous transformation, but a series of new beginnings, involving dissolution or destabilization of the above forms of religious life and the creation of new ones. As we see here, what characterizes the secular world today is not the absence of religion although in some societies religious belief and practice have decreased notablemente-, but rather the continuous multiplication of new options, religious, spiritual and anti-religious, to which individuals and groups cling to give meaning to their lives and to shape their spiritual aspirations. What this means for the world including new forms of collective religious life that promotes, with its tendency to violence-generating massive mobilization is what Charles Taylor unravels in this book as appropriate for our time as timeless