He himself was very well educated, a collector of books, and turned the prosperous court of Aquitaine into the learning centre of Southern France.
He called upon his suzerain Robert II of France to aid in subduing his vassal, Boso of La Marche.
He had to give up Confolens, Ruffec, and Chabanais to compensate William II of Angoulême, but Fulbert negotiated a treaty (1020) outlining the reciprocal obligations of vassal and suzerain.
His piety and culture brought peace to his vast territories, and he tried to stem the tide of feudal warfare then destroying the unity of many European nations by supporting the current Peace and Truce of God movements initiated by Pope and Church.
His court was of an international flavour, receiving ambassadors from the Emperor Henry II, Alfonso V of León, Canute the Great, and even his suzerain, Robert of France.
William considered the proposal seriously but, upon visiting Italy himself, he found the political situation so unfavorable that he renounced the crown for himself and his heirs.
His reign ended in peace and he died on the last (or second to last) day of January 1030 at Maillezais, which he founded and where he is buried.