Abstract
Since the international Conference of Religious Socio logy at Louvain in 1956, religious sociology has pro gressed both in extension and in depth.
In extension, by the creation of new associations and of centres of research, the more frequent use of sociology in the service of the pastoral work of the Church, and the extension of studies of the morpho logy of Catholicism.
In depth, both by empirical research with a scientific objective, and by theoretical studies and certain general works and treatises.