The rebirth of bioethics: extending the original formulations of Van Rensselaer Potter.

Van Rensselaer Potter's original concept of bioethics as a global integration of biology and values was designed to guide human survival. His attention to the creation of human knowledge and the incorporation of ecological concepts and values into medicine and health remain important, yet largely neglected, contributions deserving of further elaboration. Bioethicists should heed his warning about unsustainable progress, particularly in health care systems, and work toward changing their behaviors. Incorporating life-affirming spiritual values and extending Potter's global bioethics to a deeper bioethics seem essential.