 Some abbacies passed from father to son, and then even grandsons.A revival of the ascetic tradition came in the second half of the century, with the culdee or "clients (vassals) of God" movement founding new monasteries detached from family groupings.The monasteries of the Irish missions, and many at home, adopted the Rule of Saint Columbanus, which was stricter than the Rule of Saint Benedict, the main alternative in the West.