This book offers an intervention into the process of decolonization through the re-subjectification of the settler subject. The authors draw on what Deleuze and Guattari call minor threads of philosophy, pedagogy, spirituality, and healing practices rooted in neglected lineages of European thought and ceremony. The book proposes a methodology for unontologizing the settler subject, which they term "desettlering." Rather than fetishizing indigenous theory and practice as a mode for resubjectifying settlers to facilitate land-based decolonization, it offers a fresh approach by looking toward alternative sets of traditions and identities. These alternatives are used to interrogate minoritarian European philosophies, practices, and beliefs, which the authors propose could be deployed to unontologize the settler within current historical conditions. Asserting that such a process is not volitional but a historical necessity, the book offers a novel and timely investigation into who settlers become if they intend to engage seriously in decolonization. It will appeal to an interdisciplinary audience of scholars and researchers in psychological science, social psychology, counseling, philosophy, indigenous studies, and sociology.