Caodaism emerged in a landscape marked by colonial domination and intense political upheaval, and its history reflects a continual struggle to safeguard spiritual autonomy amid shifting regimes. Under French colonial rule, its rapid growth and capacity for mass mobilization led to surveillance, restrictions, and the exile or imprisonment of key leaders. The movement’s eclectic scriptures and reliance on séances drew skepticism from intellectuals and from adherents of more established traditions, who questioned both its theological rigor and the authenticity of its revelations. These early controversies already reveal a pattern: a religion seeking to articulate a universal vision while being treated by authorities and critics as a suspect political force or an unorthodox experiment.

As wars engulfed Vietnam, Caodaism’s attempt to protect its communities took the form of armed militias and complex political alliances, which became a major source of controversy. During the First Indochina War and the subsequent conflicts, Caodaist forces controlled semi-autonomous territories and negotiated with different factions, leading to accusations of religious feudalism and political opportunism. The movement’s military role and shifting loyalties blurred the line between spiritual mission and temporal power, and internal tensions arose between religious leaders, military commanders, and political figures. Under later nationalist governments, especially in the south, efforts to disarm Caodai forces, co-opt leadership, and curtail autonomy further weakened institutional cohesion and intensified internal fragmentation.

The establishment of a communist regime brought a new and severe phase of repression that left deep marks on Caodai life. Authorities viewed the religion as politically suspect due to its prior armed activities and foreign connections, leading to the closure or close monitoring of temples, confiscation of property, and restrictions on religious practice and organization. Attempts to fold Caodaism into state-controlled religious structures generated enduring disputes between state-recognized bodies and independent or “pure” factions, each claiming to represent the authentic tradition. Reports of limitations on religious education, publications, and overseas contact underscore how the movement’s spiritual aspirations were repeatedly constrained by political calculations.

Beyond its relationship with the state, Caodaism has also wrestled with internal and doctrinal challenges that shape its public image. Its syncretic embrace of Buddhist, Taoist, Confucian, and Christian elements, together with spirit communications, has drawn criticism from other religious communities and scholars who question the authenticity of its revealed texts and the reliability of mediumship. Reliance on séances has made leadership and doctrine vulnerable to competing revelations, contributing to sectarian splits over authority, succession, and temple administration. These divisions, and the emergence of multiple branches, have complicated efforts to present a unified spiritual path.

Abroad, Caodai communities have had to navigate the dual task of preserving a distinctive religious identity while adapting to new cultural environments. Limited recognition and understanding in host societies, along with competition from more established religions, have made it difficult to secure clear institutional status and public legitimacy. Diaspora communities have also experienced internal disagreements over leadership and alignment with authorities in Vietnam, mirroring the fractures within the homeland. Across these varied contexts, the tradition continues to bear the imprint of a faith that has repeatedly been drawn into political storms while striving to maintain a transcendent, universal vision.