Theravada Buddhism is the largest religion in Laos. It is practiced by 66% of the population. Almost all ethnic or "lowland" Lao (Lao Loum and Lao Lom) are followers of Theravada Buddhism; however, they constitute only 40-50% of the population. The remainder of the population belongs to at least 48 distinct ethnic minority groups. Most of these ethnic groups are practitioners of Tai folk religion, with beliefs that vary greatly among groups. Tai folk religion is predominant among northern groups of Tai people, such as the Thai Dam and Thai Daeng, as well as among Mon-Khmer and Tibeto-Burman groups. Even among lowland Lao, many pre-Buddhist phi religious beliefs have been incorporated into Theravada Buddhist practice. Catholics and Protestants constitute approximately 2% of the population. Other minority religious groups include Baháʼí Faith, Islam, Mahayana Buddhism, and Confucianism. A very small number of citizens are atheist or agnostic. Although the government prohibits foreigners from proselytizing, some resident foreigners associated with private businesses or nongovernmental organizations quietly engage in religious activity. The Lao Front for National Construction is in charge of religious affairs within the country and all religious organizations within Laos must register with it. History Buddhism was introduced to Laos beginning in the eighth century by Mon Buddhist monks and was widespread by the fourteenth century. A number of Laotian kings were important patrons of Buddhism. Beginning in the late 1950s, the Pathet Lao attempted to convert monks to the leftist cause and to use the status of the sangha to influence the thoughts and attitudes of the populace. The effort was in many ways successful, despite efforts by the Royal Lao Government to place the sangha under close civil administrative control and to enlist monks in development and refugee assistance programs. Political scientist Stuart-Fox attributed the success of the Pathet Lao to the inability of the Lao Loum elite to integrate the monarchy, government, and sangha into a set of mutually supportive institutions. Popular resentment of the aristocracy, division of the sangha into two antagonistic sects, the low level of its religious education and discipline, and opposition to foreign (i.e., Western) influence all contributed to the receptiveness of many monks to Pathet Lao overtures. The politicization of the sangha by both sides lowered its status in the eyes of many, but its influence at the village level augmented popular support for the Pathet Lao political platform, which paved the way