An version of this article was printed in Humanism Ireland , May-June, Vol. 152 (2015) Until the second half of the twentieth century, there was little disagreement, at least within mainstream western thought, over the standard for human death. Death occurs when the heart has stopped beating and breathing has come to an end. The issue of whether or not someone is dead was generally held to be a simple question of fact. However, scientific and technological advances since the late 1950s—where the heart and breathing of patients could be artificially maintained by ventilators for weeks or months after all functions of the brain are irreversibly lost—have made the whole question more complex. As a result of this, the Harvard Brain Death Committee—which included a number of medical professionals, lawyers and theologians—was established; in their landmark 1968 report they argued that the clinical standard of diagnosing death should be when the whole brain, or brainstem, ha
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