At just about every stop I’ve made so far on my book tour, what I’ve come to think of as The Question comes up. I talk about the origins of the long right-wing dominance of American politics, and the reasons I believe that dominance is coming to an end. Then someone asks, “How can you be optimistic about the prospects for progressive change, when big money has so much influence on politics?”

It’s a good question.

The public wants change. “If Americans have ever been angrier with the state of the country,” begins a new strategy memo from the polling organization Democracy Corps, “we have not witnessed it.”

Nor is the demand for change solely about Iraq: there has been a strong revival of economic populism. Democracy Corps asked those who believe America is on the wrong track to choose phrases that best described their views of what’s gone wrong. The most commonly chosen were “Big businesses get whatever they want in Washington” and “Leaders have forgotten the middle class.”

So much, by the way, for pundits who claim that Americans don’t care about economic inequality.

Longer-term studies of public opinion suggest a substantial leftward shift. James Stimson, a political scientist who uses data from many polls to construct an index of the overall liberalism or conservatism of the electorate, finds that America is now more liberal than it has been since the early 1960s. And the tactics the right has historically used to distract voters from economic issues, above all the exploitation of racial tensions, have been losing their effectiveness.