 The dominant epistemological outlook in Christian science and religion has been critical realism, a position that applies both to theology (theological realism) and to science (scientific realism). Barbour (1966) introduced this view into the science and religion literature; it has been further developed by theologians such as Arthur Peacocke (1984) and Wentzel van Huyssteen (1999). Critical realism aims to offer a middle way between naïve realism (the world is as we perceive it) and instrumentalism (our perceptions and concepts are purely instrumental). It encourages critical reflection on perception and the world, hence “critical”. Critical realism has distinct flavors in the works of different authors, for instance, van Huyssteen (1998, 1999) develops a weak form of critical realism set within a postfoundationalist notion of rationality, where theological views are shaped by social, cultural, and evolved biological factors. Murphy (1995: 329–330) outlines doctrinal and scientific requirements for approaches in science and religion: ideally, an integrated approach should be broadly in line with Christian doctrine, especially core tenets such as the doctrine of creation, while at the same time it should be in line with empirical observations without undercutting scientific practices.