Donald Trump and Bernie Sanders are only the latest poles on the populism spectrum, a movement that first took shape in America in the 1890s.

Kate Schatz, author of Rad Women Worldwide, on why the inspiring story of Sophie Scholl and The White Rose standing up to Adolf Hitler matters today.

At a time when the national dialogue is consumed and divided by politics more than ever, books are rising to the forefront of the conversation.

The work of resistance is never a fixed, quantifiable event. Its impact ripples onward without end, as these books illustrate.

Thoreau was much more than a benign nature lover. He was an abolitionist, a political activist, and a believer in the unseen forces that moved the universe.

Lyn Mikel Brown shares the books and authors, from Gloria Steinem to Rebecca Solnit, that ignited and then shaped her passion for girl-fueled activism.