The changing styles are the expression of a restless search for something which shall commend itself to our aesthetic sense; but as each innovation is subject to the selective action of the norm of conspicuous waste, the range within which innovation can take place is somewhat restricted. The innovation must not only be more beautiful, or perhaps oftener less offensive, than that which it displaces, but it must also come up to the accepted standard of expensiveness. - Thorstein Veblen