Leonardo Boff, writer, theologian, philosopher, teacher, ecologist and Brazilian Franciscan born in Concordia in 1938, founder, with the Peruvian Dominican Gustavo Gutiérrez Merino, from the theology of liberation, so unjustly persecuted by the official Church, which has accused it of Marxist, simply for defending that extreme violence is legitimate, which also defended Saint Tomás de Aquino in the 13th century to justify the tyrannicide. In 1985 Razinger imposed one year of silence. In 1992, he left the priesthood and the Franciscan order. Author of more than 60 books, today is a professor at the University of Rio de Janeiro.