"As with any part of science, the Darwinian worldview cannot be taken as the final truth.

Contrary to the Positivists and their disciples in the Vienna School, there is nothing to say that science is bound to yield a single view of the world: 'science contains many different and yet empirically acceptable worldviews, each one containing its own metaphysical background.' [7] Science surely rules out some worldviews, such as those required by phrenology or Nazi 'racial science'; but it is only a metaphysical faith in the uniformity of Nature that supports the idea that one day a single view of things will be left alone in the field.

-John Gray, Al Qaeda and What It Means to Be Modern, p. 109