Mater et Magistra §220

²²⁰ On this basic principle, which guarantees the sacred dignity of the individual, the Church constructs her social teaching. She has formulated, particularly over the past hundred years, and through the efforts of a very well informed body of priests and laymen, a social doctrine which points out with clarity the sure way to social reconstruction. The principles she gives are of universal application, for they take human nature into account, and the varying conditions in which man's life is lived. They also take into account the principal characteristics of contemporary society, and are thus acceptable to all.