On January 21, 2017, the day after Donald J. Trump's inauguration, more than three million marchers of all ages and walks of life took to the streets as part of the largest protest in American history. In red states and blue states, in small towns and major urban centers, from Boise to Boston, Bangkok to Buenos Aires, people from eighty-two countries -- on all seven continents -- rose up in solidarity to voice a common message: Hear our voice. It became the largest global protest in modern history. Now Women's March organizers tell their personal stories and reflect on their collective journey. They provide an inside look at how the idea for the event originated, how it was organized, how it became a global movement that surpassed their wildest expectations, and how they are sustaining and building on the widespread outrage, passion, and determination that sparked it. Those stories are interwoven with "voices from the March," recollections from real women who were there, across the world, along with photographs and brief essays by noted writers, celebrities, and artists.