Only two men of this time are raised by their character and learning above the dead level of prevailing mediocrity: Chasdaï Crescas and Isaac ben Sheshet. They both lived in the kingdom of Aragon, where the Jews under Pedro IV and Juan I were neither so poor nor so oppressed as their brethren in Castile. Chasdaï Crescas and Isaac ben Sheshet were not sufficiently great to dominate their contemporaries, or prescribe their own views as rules of conduct; they were, however, the foci of large circles, and were frequently appealed to for final decisions on complicated and difficult questions. Both worked earnestly for the maintenance and furtherance of Judaism, for the preservation of peace in the communities at home and abroad, and for the consolation and re-animation of the broken in spirit, notwithstanding that their means were limited, and the times unpropitious. Chasdaï ben Abraham Crescas (born 1340, died 1410), originally of Barcelona, and subsequently of Saragossa, where he ended his days, did not belong to the class of ordained rabbis, but he had been educated on Talmudical lines, and was an accomplished Talmudist. His wealth and his occupations seem to have indisposed him for this honorable position. Chasdaï Crescas was in close relation with the court of Juan I, of Aragon, was frequently consulted on important state questions, and also had much intercourse with the grandees of the kingdom. In the views of the various schools of philosophy he was well versed; the independence and depth of thought he evinced in dealing with them stamp him an original thinker. His ideas, of course, were largely based upon religious, or rather Jewish convictions, which, however, he presented in an original form. Chasdaï Crescas was the first to recognize the weak points of the prevailing Aristotelianism, and he attacked it with irresistible force. Of his youth nothing is known, and it is impossible to say under what influences those ripe powers of mind were developed which enabled him to question the authority not only of Maimonides and Gersonides, but of Aristotle himself. His ancestors were learned Talmudists, and his grandfather enjoyed a reputation equal to that of the famous Asheri family. In Talmudical studies he was a disciple of Nissim Gerundi, of Barcelona. Chasdaï Crescas was kind and gentle, a friend in need, and a faithful defender of the weak. During the unhappy days which broke upon the Jews of Spain in his lifetime, he devoted all his powers to the mitigation of the disasters which befell his brethren.