Ayahuasca Mamancuna merci beaucoup: Diversification and internationalization of Peruvian ayahuasca vegetalismo This thesis analyzes the relationship of foreigners to Peruvian vegetalismo. It contemplates outsiders traveling to Peru in search of ayahuasca-consuming experiences, gringos who themselves became curanderos and Peruvian ayahuasqueros who travel to hold workshops for urban middle-class clients in Europe and the USA. The research does not focus on ayahuasca tourism linked to travel packages and sophisticated lodges in Iquitos but on retreat centers in Pucallpa where outsiders join ceremonies and plant diets, in search of altered states of consciousness, self-knowledge, healing, mystic experiences, contact with nature and with traditional cultures, or simply because of curiosity. Through the analysis of the trajectories and activities of various curanderos, including indigenous, poor mestizo, middle-class Peruvian, and gringos, the study charts the expansion, diversification, and internationalization of Peruvian vegetalismo. The thesis identifies the contours of transnational networks and circuits that promote the migration and flux of people and -sacred technologies‖ at a global scale. These articulated techniques and knowledges are progressively formalized and institutionalized, representing a hybridism between shamanism, science and service. It is argued that this phenomenon should not be understood as merely commoditization of indigenous spirituality, or neocolonialism, but as a product of deliberate local strategies to adapt to changing socio-economic conditions. The negotiations between the world of the gringos and their expectations and the local traditions (where sorcery plays a central role) are done under different hierarchical conditions, and frequently involve tensions. Creative translations are performed on both sides. The foreign references are dynamically incorporated and reappropriated under the logic of vegetalismo.In this sense, it could be said that the current modifications introduced in Peruvian vegetalismo represent some sort of continuity with its historical process of formation and original synthesis between different indigenous ethnic traditions and Christian elements. In any case, it is no longer possible to consider the local formation of the curanderos apart from their interactions with foreigners, or these articulations between the local and the global.vii