Forthcoming in Routledge Handbook of Contemporary Thailand, edited by Pavin Chachavalpongpun, (Oxon: Routledge) seeks to justify "the separation of religious and political authority, the expulsion of religious law from the legal system, and sometimes even the exclusion of religion from the public sphere" (Künkler and Shankar 2018, 3).It must be recognized, however, that secularism as state practice rarely results in a clean separation of religion and politics or church and state. On the contrary, some have argued that the modern secular state is characterized less by its separation from than its expanded role in managing "religion" (Asad 2003).According to this line of argument, secularism as political practice should be understood as the modern state's assertion of "sovereign power to reorganize substantive features of religious life, stipulating what religion is or ought to be, assigning its proper content, and disseminating concomitant subjectivities, ethical frameworks, and quotidian practices" (Mahmood 2015, 3). While scholars may disagree on how secularisation and secularism should be understood in relation to the state, they recognize that the politics of secularisation and secularism pivots around struggles that seek to define, to blur, or to deny the very existence of boundaries separating a "religious" domain from that which stands outside it ("the secular").Gorski (2018, 49) helpfully highlights how such boundary struggles typically involve efforts to change either the location of activities from one domain to the other, or the degree of permeability between the religious and secular domains.In light of these conceptual clarifications, Thailand is an ambiguous and contradictory case. It is possible to find evidence of secularisation processes leading to a significant degree of differentiation and separation of religion and state. However, the overarching ideological framework within which a "secular" Thai state has emerged in the course of the 19th and 20th centuries reflects a fundamentally "Buddhist" worldview. Thailand, in short, has adopted a predominant mode of secularism that translates into extensive state control of the religious field.