http://www.americanprogress.org/issues/2007/11/progressive_growth.html
The American Dream has been a story of progressive policy establishing conditions in which individuals have been able to seize opportunities and make a better life for themselves, their children, their families, and their communities. It can be so again. The United States faces unprecedented challenges. Yet at the Center for American Progress, we are optimistic about America's economic future. We are confident that the ladder of economic mobility can be rebuilt with the right leadership and progressive policy.