World and church have changed so much since the Second Vatican Council (1962-1965). With each change, religious congregations have had to review and update both their charism and mission, with ever new emphases in spirituality and mission. The 122 letters of the post-Vatican II superiors general of the Spiritans give some idea of the paths traced by missiology during the period. They offer a chronicle of missiological thinking through the turbulent time of crisis in the 1960s and early 1970s, and the gradual reclaiming of the Spiritans’ essential charism of the evangelization of the poor, but in a very changed world and a very changed church.