Natural Causes: An Epidemic of Wellness, the Certainty of Dying, and Killing Ourselves to Live Longer (Twelve, 2018) was Ehrenreich's final book, a sustained argument against the American belief that death and decay can be optimized away through sufficient discipline, screening, and self-care. The book drew on her training as a cell biologist to argue that the body is not a machine obeying a central controlling mind — it is a community of cells with their own agendas, including agendas that produce cancer, autoimmune disease, and ultimately death. The argument extended into a broader critique of Western science's mission, as Ehrenreich put it, to crush all forms of agency — to reduce living things to mechanisms, denying intentionality to anything that could not pass the tests designed by the deniers. She insisted that agency, in some form, is everywhere, from inchworms to electrons.
The book's relevance to the AI moment is inverse. Where Western science denied agency to the living, the technology industry now attributes agency — intelligence, creativity, judgment — to the non-living. The professional class is caught between these two errors: a scientific tradition that reduced workers to inputs, and a technological revolution that elevates machines to collaborators. The worker, in both frames, disappears.
Ehrenreich's late argument is that agency is not a binary property — possessed by humans, absent from everything else — but a continuum. This framing, uncomfortable for traditional humanism, is also uncomfortable for the 'machines are now thinking' narrative of the AI discourse, because it refuses the sharp distinction both frames require. On Ehrenreich's view, cells have agendas, immune systems make choices, and the question of what AI systems 'are doing' should be analyzed in the same continuous framework rather than being treated as either trivially not-real or suddenly human-equivalent.
The book also contains Ehrenreich's most personal reflection on the limits of control. Written in her late seventies, after decades of fighting in print and in person, the book has the quality of a farewell — a farewell to the American insistence that every problem has a solution and every solution begins with the right attitude. Sometimes the honest response is not to solve but to see: to look at the situation without the filter of compulsory hopefulness and describe what is actually there.
For the AI transition, this late Ehrenreich is indispensable. The transition is being described primarily in optimizing language: here are the productivity gains, here are the efficiency improvements, here are the adaptations required to capture the benefits. Ehrenreich's final work insists on a different posture — the posture of the observer who has earned the right to refuse to solve, who insists on describing what is actually happening before prescribing what should be done about it.
Ehrenreich drew on her PhD training in cell biology, which she had largely set aside during her career as a journalist, to ground the book's arguments about cellular agency and the limits of medical control. The book emerged from her growing impatience with the wellness industry and with what she saw as the American insistence that death itself was a failure of self-management.
Published in April 2018 when she was 77, the book was widely reviewed. It was her last major work; she died in September 2022, ninety days before ChatGPT launched — a gap this book's foreword identifies as one of the cruel ironies in American social criticism.
Agency as continuum. Agency is not a binary property possessed by humans alone — it exists in graduated forms from inchworms to electrons, a framing that destabilizes both traditional humanism and AI consciousness claims.
The body as community. The body is not a machine obeying a central controlling mind but a community of cells with their own agendas — a framework that disrupts the optimizing-self narrative of the wellness industry.
The limits of control. Not every problem has a solution, and the insistence that every problem should be solved is itself part of the problem.
Seeing vs solving. The honest response to a complex situation is often to describe it clearly before prescribing what should be done — a posture the AI discourse, with its relentless action orientation, makes difficult.
Science's mission of crushing agency. Western science has systematically denied intentionality to everything except credentialed humans — a denial the AI moment inverts by attributing intelligence to silicon while still denying it to bodies.