Complex sentence: By the 11th century, the bonds of vassalage and the granting of fiefs had spread throughout much of French society, but it was in no ways universal in France: in the south, feudal grants of land or of rights were unknown.
Split into simpler sentences: By the 11th century, the bonds of vassalage and the granting of fiefs had spread throughout much of French society. The feudal/vassal system was not universal in France: in the south, feudal grants of land or rights were unknown.