To understand the new American dream, we have to understand the new America.

This was the theme of today’s opening plenary session at RailVolution, a four-day conference dedicated to discussing strategies for building livable communities served by transit. This year’s conference, which takes place in Washington, DC, will discuss the best strategies to support downtowns, the benefits rail can bring to a regional economy, and policy initiatives that can support these goals.

Opening this morning’s plenary was Chris Leinberger, President of LOCUS: Responsible Real Estate Developers and Investors. Joining him was Manuel Pastor, Professor of American Studies and Ethnicity at the University of Southern California, Los Angeles.

Both Leinberger and Pastor spoke about shifting trends in the United States, and how these shifts will influence communities’ strategies for building homes, business areas and transportation networks. The U.S. is diversifying both ethnically and racially, Pastor explained, and the suburbs in particular are growing more diverse than ever before. These aren’t the only changes at work, however. Leinberger added that the U.S.’s population is growing older, as millions of Americans reach retirement age. The number of homes in America without children is also on the rise, and young people are increasingly moving to cities and urban areas.