This talk will discuss the concept and contemporary influence of Engaged Buddhism, which emerged and spread during the modern period amidst war and violence in mainland Southeast Asia.The presentation will explore the practices and efforts of those adhering to this mode of Buddhism by offering some cases from Vietnam, Laos, Thailand and particularly Cambodia. The talk will consider the history of Khmer monastic movements in the light of Socially Engaged Buddhism as well as the challenges this Buddhist movement poses to established doctrines and oders.