The organization of the Waldenses was a reaction against the great splendour and outward display existing in the medieval Church; it was a practical protest against the worldly lives of some contemporary churchmen. Amid such ecclesiastical conditions the Waldenses made the profession of extreme poverty a prominent feature in their own lives, and emphasized by their practice the need for the much neglected task of preaching.
Among the doctrinal errors which they propagated was the denial of purgatory, and of indulgences and prayers for the dead. They denounced all lying as a grievous sin, refused to take oaths and considered the shedding of human blood unlawful. They consequently condemned war and the infliction of the death penalty. Some points in this teaching so strikingly resemble the Cathari that the borrowing of the Waldenses from them may be looked upon as a certainty. Both sects also had a similar organization, being divided into two classes, the Perfect (perfecti) and the Friends or Believers
Among the Waldenses the perfect, bound by the vow of poverty, wandered about from place to place preaching. Such an itinerant life was ill-suited for the married state, and to the profession of poverty they added the vow of chastity. Married persons who desired to join them were permitted to dissolve their union without the consent of their consort. Orderly government was secured by the additional vow of obedience to superiors. The perfect were not allowed to perform manual labour, but were to depend for their subsistence on the members of the sect known as the friends. These continued to live in the world, married, owned property, and engaged in secular pursuits. Their generosity and alms were to provide for the material needs of the perfect. The friends remained in union with the Catholic Church and continued to receive its sacraments with the exception of penance, for which they sought out, whenever possible, one of their own ministers. The name Waldenses was at first exclusively reserved to the perfect; but in the course of the thirteenth century the friends were also included in the designation. The perfect were divided into the three classes of bishops, priests, and deacons. The bishop, called "major" or "majoralis", preached and administered the sacraments of penance, Eucharist, and order. The celebration of the Eucharist, frequent perhaps in the early period, soon took place only on Holy Thursday. The priest preached and enjoyed limited faculties for the hearing of confessions. The deacon, named "junior" or "minor", acted as assistant to the higher orders and by the collection of alms relieved them of all material care. The bishop was elected by a joint meeting of priests and deacons. In his consecration, as well as in the ordination of the other members of the clergy, the laying-on of hands was the principal element; but the recitation of the Our Father, so important in the Waldensian liturgy, was also a prominent feature. The power of jurisdiction seems to have been exercised exclusively by one bishop, known as the "rector", who was the highest executive officer. Supreme legislative power was vested in the general convention or general chapter, which met once or twice a year, and was originally composed of the perfect but at a later date only of the senior members among them. It considered the general situation of the sect, examined the religious condition of the individual districts, admitted to the episcopate, priesthood, or diaconate, and pronounced upon the admission of new members and the expulsion of unworthy ones.