This was finally achieved, after a hideous story of fratricidal hatred and murder by poison, by Peter IV.
In spite of revolts and of fratricidal struggles a state was formed.
As yet he had preached his Gospel without saying much about corruptions in the Roman Church, and it was his political denunciation of the fratricidal wars into which the pope, not less than others, was drawing his fellow-countrymen, that first led to rupture with the papal see.
The Anti-trinitarian proved to be the chief dissolvent, and from 1560 onwards the relations between the two principal Protestant sects, the Lutherans and the Calvinists, were fratricidal rather than fraternal.
At the close of his life King James divided his states between his sons by Yolande of Hungary, Pedro and James, leaving the Spanish possessions on the mainland to the first, the Balearic Islands and the lordship of Montpellier to the second - a division which inevitably produced fratricidal conflicts.