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My dissertation is an interdisciplinary contribution to critical suicide studies that builds on environmental and health humanities in conversation with postcolonial, disability, gender and sexuality, and narrative studies. My term suicide justice links these fields, offering new ways of imagining suicide prevention for individuals and groups. U.S. psychologist Edwin Shneidman coined the term suicidology to describe the scientific study of suicide and suicide prevention. Shneidman added the -ology suffix to position the field as a science; however, its Greek origin also denotes a style of language, as in eulogy. Following this meaning, my term narrative suicidology is less of a transformation—rather, it is a reclamation of origins. In fact, since the field’s foundations in the U.S. in the 1950s, suicidologists have been studying suicide notes for prevention insights, rarely if ever considering their relationship to a cultural or literary imaginary of a suicide note. My dissertation conceives of narrative suicidology broadly, beginning by placing a genuine note in its cultural, gendered, racialized, and narrative context. In doing so, I develop a critique of what I call settler suicidology in white settler colonies, where Indigenous suicide rates are disproportionately high. I then scale from individual self-killing to mass death, examining the idea of preventing “species suicide” as it emerged from Cold War fears of nuclear annihilation and transformed in the Anthropocene to refer to climate change. I turn to anglophone novels written by Indigenous, Asian American, Black, and British authors as well as multimedia art projects to situate narrative suicidology as a multifaceted and justice-oriented approach that complements biomedical and social science suicide studies. Finally, in the conclusion I advocate for a therapeutic purpose in creating, studying, and teaching texts about suicide as a humanist counterpart to the dominant medicalized suicide prevention field in the U.S.