As nurses enter the practice of nursing, they recognize the importance of using their education to guide their actions in the clinical setting. “Theories are models that guide nursing thinking, being and doing” (Parker, 2006, p.8). Comparing theories helps shed light on the fundamental structure of theories and shows the benefits of using a particular theory when practicing nursing. The theories of Martha Rogers and Betty Neuman were developed around the same time, meaning that different theories can arise from the same general world situation. Rogers' science of unitary beings illustrates a truly holistic view, as it hypothesizes that human beings and their environments are energy fields that are irreducible elements of the universe. On the other hand, Neuman uses a systematic model to describe human-environment interaction. Although these theories have similarities, their differences as models for nursing and in their clinical use provide good insight into the importance of the theories for nursing practice and research. This article will discuss Rogers' and Neuman's theories, their implications in practice and research, and the future of these theories in nursing. These two theories were chosen because they offer different perspectives on how humans interact with the world, community, and health care. As one of the leading scientists in nursing, Martha Rogers developed "Martha E. Rogers' Science of Unitary Beings" to provide a scientific and holistic approach. theory of nursing and nursing education (Parker, 2006, p. 160). Most of his theory is based on the concept of energy fields, which Rogers believed was central to nursing rather than health or health promotion (Parker, 2...... middle of article...... for these For reasons as yet unconfirmed, its ability to be used as a basis for transcultural nursing in the era of globalization provides some stability to the theory. The Rogerian Journal of Nursing Science, founded in 1974, continues to promote research and application of Rogers' theory (Parker, 2006, p. 161). theory, and the journal's acceptance as an academic resource shows that this theory will be in place. However, without greater acceptance by the broader health care community, Rogers' theory will remain on the fringes of nursing education. . Thus, although Rogers' science of unitary beings has many cultural benefits for nursing, it is unlikely that this theory will. be used in practice until it becomes more widely accepted.