ABSTRACT
THE VISION OF MATTER To summarize crudely, on the idealist side it seemed that matter must be shown as simply a form of mind, a mere logical construction out of sense-data (Leibniz, Berkeley, Hume, Hegel, Ayer). On the materialist side, it seemed equally clear that mind was only a form of matter, that ‘the brain secretes thought just as the liver secretes bile’1
(Hobbes, Laplace, La Mettrie, Marx, Skinner). T.H. Huxley managed to embrace both kinds of reduction at once, but this was an unusual achievement.2
