From John Lewis' bio:

He was born the son of sharecroppers on February 21, 1940, outside of Troy, Alabama. He grew up on his family's farm and attended segregated public schools in Pike County, Alabama. As a young boy, he was inspired by the activism surrounding the Montgomery Bus Boycott and the words of the Rev. Martin Luther King Jr., which he heard on radio broadcasts. In those pivotal moments, he made a decision to become a part of the Civil Rights Movement. Ever since then, he has remained at the vanguard of progressive social movements and the human rights struggle in the United States.

As a student at Fisk University, John Lewis organized sit-in demonstrations at segregated lunch counters in Nashville, Tennessee. In 1961, he volunteered to participate in the Freedom Rides, which challenged segregation at interstate bus terminals across the South. Lewis risked his life on those Rides many times by simply sitting in seats reserved for white patrons. He was also beaten severely by angry mobs and arrested by police for challenging the injustice of Jim Crow segregation in the South.

During the height of the Movement, from 1963 to 1966, Lewis was named Chairman of the Student Nonviolent Coordinating Committee (SNCC), which he helped form. SNCC was largely responsible for organizing student activism in the Movement, including sit-ins and other activities.

While still a young man, John Lewis became a nationally recognized leader. By 1963, he was dubbed one of the Big Six leaders of the Civil Rights Movement. (The others were Whitney Young, A. Phillip Randolph, Martin Luther King Jr., James Farmer and Roy Wilkins). At the age of 23, he was an architect of and a keynote speaker at the historic March on Washington in August 1963.

In 1964, John Lewis coordinated SNCC efforts to organize voter registration drives and community action programs during the Mississippi Freedom Summer. The following year, Lewis helped spearhead one of the most seminal moments of the Civil Rights Movement. Hosea Williams, another notable Civil Rights leader, and John Lewis led over 600 peaceful, orderly protestors across the Edmund Pettus Bridge in Selma, Alabama on March 7, 1965. They intended to march from Selma to Montgomery to demonstrate the need for voting rights in the state. The marchers were attacked by Alabama state troopers in a brutal confrontation that became known as “Bloody Sunday.” News broadcasts and photographs revealing the senseless cruelty of the segregated South helped hasten the passage of the Voting Rights Act of 1965.

Despite more than 40 arrests, physical attacks and serious injuries, John Lewis remained a devoted advocate of the philosophy of nonviolence. After leaving SNCC in 1966, he continued his commitment to the Civil Rights Movement as Associate Director of the Field Foundation and his participation in the Southern Regional Council's voter registration programs. Lewis went on to become the Director of the Voter Education Project (VEP). Under his leadership, the VEP transformed the nation's political climate by adding nearly four million minorities to the voter rolls.