At the turn of the twentieth century, the U.S. system of public finance underwent a dramatic, structural transformation. The late nineteenth-century system of indirect taxes, associated mainly with the tariff, was eclipsed in the early decades of the twentieth century by a progressive income tax. This shift in U.S. tax policy marked the emergence of a new fiscal polity - one that was guided not simply by the functional and structural need for government revenue but by concerns for equity and economic and social justice. This Article explores the paradigm shift in legal and economic theories that undergirded this dramatic shift in U.S. tax policy. More specifically, this Article contends that a particular group of academic economists played a pivotal role in supplanting the "benefits theory" of taxation, and its concomitant vision of the state as a passive protector of private property, with a more equitable principle of taxation based on one's "ability to pay" - a principle that promoted a more active role for the state in the distribution of fiscal burdens. In facilitating this structural transformation, these theorists were able to use the growing concentration of wealth and the ascendancy of new economic ideas as justifications for using a progressive income tax to reallocate the burdens of financing the burgeoning American regulatory, administrative, and welfare state.

It is now generally agreed that we pay taxes not because the state protects us, or because we get any benefits from the state, but simply because the state is a part of us. The duty of supporting and protecting it is born with us. In a civilized society the state is as necessary to the individual as the air he breathes; unless he reverts to stateless savagery and anarchy he cannot live beyond its confines. His every action is conditioned by the fact of its existence. He does not choose the state, but is born into it; it is interwoven with the very fibers of his being; nay, in the last resort, he gives to it his very life. To say that he supports the state only because it benefits him is a narrow and selfish doctrine. We pay taxes not because we get benefits from the state, but because it is as much our duty to support the state as to support ourselves or our family; because, in short, the state is an integral part of us.

The influence of economist Richard T. Ely extends far beyond the American Economic Association, which he founded in 1885 as a progressive alternative to the laissez-faire leaning Political Economy Club. Through the activist Social Gospel movement, Ely transplanted the collectivist ideas of Bismarck’s Germany to American soil.