 The integration model is more extensive in its unification of science and theology. Barbour (2000) identifies three forms of integration. First, natural theology, which formulates arguments for the existence and attributes of God. It uses interpretations of results from the natural sciences as premises in its arguments. For instance, the supposition that the universe has a temporal origin features in contemporary cosmological arguments for the existence of God. Likewise, the fact that the cosmological constants and laws of nature are life-permitting (whereas many other combinations of constants and laws would not permit life) is used in contemporary fine-tuning arguments (see the entry to  fine-tuning arguments).  Second, theology of nature starts not from science but from a religious framework, and examines how this can enrich or even revise findings of the sciences. For example, McGrath (2016) developed a Christian theology of nature, examining how nature and scientific findings can be interpreted through a Christian lens. Thirdly, Barbour believed that Whitehead’s process philosophy was a promising way to integrate science and religion.