Voltaire also contributed directly to the new relationship between science and philosophy that the Newtonian revolution made central to Enlightenment modernity. Especially important was his critique of metaphysics and his argument that it be eliminated from any well-ordered science. At the center of the Newtonian innovations in natural philosophy was the argument that questions of body per se were either irrelevant to, or distracting from, a well focused natural science. Against Leibniz, for example, who insisted that all physics begin with an accurate and comprehensive conception of the nature of bodies as such, Newton argued that the character of bodies was irrelevant to physics since this science should restrict itself to a quantified description of empirical effects only and resist the urge to speculate about that which cannot be seen or measured. This removal of metaphysics from physics was central to the overall Newtonian stance toward science, but no one fought more vigorously for it, or did more to clarify the distinction and give it a public audience than Voltaire.