So fruitful has this abandonment of anthropocentric theories been, and so important in the broader history of ideas, that anti-anthropocentrism has increasingly been elevated to the status of a universal principle, sometimes called the ‘Principle of Mediocrity’: there is nothing significant about humans (in the cosmic scheme of things). As the physicist Stephen Hawking put it, humans are ‘just a chemical scum on the surface of a typical planet that’s in orbit round a typical star on the outskirts of a typical galaxy’.