Dean-Bailey, who is on our list of this year's most exciting young thinkers, was the youngest Republican woman to be elected to the New Hampshire House of Representatives.
"If I can one day visit a place and say that I helped make it a more livable and beautiful place, I'll be happy," says Chen, who's on our list of this year's most exciting young thinkers.
Carleton combines social and physical data with statistical models to assess how issues such as climate change and freshwater scarcity affect poverty and economic growth.
Axelrod, who's on our list of this year's most exciting young thinkers, has a long-term goal of "untangling the immigration bureaucracy from the criminal justice system."