Charles de Foucauld (d. 1916), a modern desert hermit, whose life and witness inspired the foundation of the Little Brothers of Jesus and other communities, is due for canonization in the coming year (May). In Fratelli Tutti Pope Francis ends by invoking the memory of this brother to all who demonstrated a new model of mission and evangelization based on friendship, solidarity, and witness among the poor. This volume includes original essays by leading theologians and spiritual writers about the significance of his witness.