As our centennial series continues, Mark Mather, demographer and associate vice president for U.S. Programs at the Population Reference Bureau (PRB), walks us through the shifts in U.S. demographics over the past 100 years.

As our centennial series continues, Mark Mather, demographer and associate vice president for U.S. Programs at the Population Reference Bureau (PRB), walks us through the shifts in U.S. demographics over the past 100 years.

As our centennial series continues, Mark Mather, demographer and associate vice president for U.S. Programs at the Population Reference Bureau (PRB), walks us through the shifts in U.S. demographics over the past 100 years. &nbsp;

100 Years of 100 Things: US Population Shifts

Brian Lehrer leads the conversation about what matters most now in local and national politics, our own communities and our lives.

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100 Years of 100 Things: US Population Shifts

100 Years of 100 Things: US Population Shifts