celibacy, voluntary refusal to enter the married state, with abstinence from sexual activity. It is one of the typically Christian forms of asceticism. In ancient Rome the vestal virgins were celibates, and successful monasticism has everywhere been accompanied by celibacy as an ideal. Among ancient Jews the Essenes were celibates. In the Judaism of postexilic times, sexual activity in the married state was considered lawful and good; otherwise it was unlawful. This norm remained in Christianity. But the mainstream of Christian tradition from the start has interpreted the Gospels and epistles as teaching that voluntary celibacy, especially virginity, is peculiarly meritorious.

In the Orthodox Eastern churches, ordinary parish clergy are married, but monks, nuns, and bishops are celibates. In the West, celibacy was common among the parish clergy beginning the 3d cent.; as time passed, the Holy See became adamant in opposing the marriage of the secular clergy (see orders, holy). By the early Middle Ages, marriage of the clergy had fallen into disrepute; church reformers aimed at concubinage and violations of the laws of chastity rather than of marriage. In the 12th cent. the most stringent laws were enacted, and by the time of the Reformation popular opinion tolerated neither concubinage nor marriage in the clergy. Protestantism rejected voluntary celibacy as an ideal.

The Roman Catholic Church in the Roman rite allows no sacerdotal marriage, but the clergy of Eastern rites united with the Holy See are often married before ordination. Some married priests from other religions or rites have converted to Catholicism and been accepted, but not all dioceses have permitted these priests to practice. Although recent popes and various national groupings of bishops have insisted on the retention of celibacy for priests, there has been considerable pressure in the United States and Europe in support of voluntary marriage for the clergy. A standard defense of the Western discipline of celibacy for parish priests is that marriage would prevent the priest from giving his complete attention to his parish; critics complain that unmarried clergy are unfit to give counsel on marital and sexual problems. Since the Second Vatican Council, the Roman Catholic Church has restored the office of deacon to a prominent place in the ministry and accepts married men into it.

The deliberate abstinence from sexual activity, usually in connection with a religious role or practice. It has existed in some form in most world religions. It may indicate a person's ritual purity (sexual relations being viewed as polluting) or may be adopted to facilitate spiritual advancement (as sexual activity would take place only within the bonds of matrimony, marriage and family were seen as an entangling distraction). In shamanistic religions, shamans are often celibate. In Hinduism, “holy men” (or women) who have left ordinary secular life to seek final liberation are celibate. Buddhism began as a celibate order, though many sects have since given up celibacy. Chinese taoism has monastics and independent celibate adepts. Islam has no institutional celibacy, but individuals may embrace it for personal spiritual advancement. Judaism has prescribed periods of abstinence, but long-term celibacy has not played a large role. The early Christian church tended to regard celibacy as superior to marriage. Since the 12th century it has been the rule for Roman Catholic clergy, though clerical celibacy was never adopted by Protestantism.

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