Harriet Tubman, known as the 'Moses of her people,' was a conductor on the Underground Railroad, helping over 300 slaves escape to freedom. She also fought for women's suffrage and equality.

Frederick Douglass, a former slave, became a prominent abolitionist and orator. His autobiography and speeches exposed the horrors of slavery and contributed to the growing anti-slavery sentiment.

Susan B. Anthony was a tireless advocate for women's suffrage and co-founded the National Woman Suffrage Association. Her work played a crucial role in the eventual passage of the 19th Amendment, granting women the right to vote.

Sojourner Truth, a former slave and women's rights activist, delivered powerful speeches that challenged societal norms and advocated for equality. Her famous 'Ain't I a Woman?' speech is a testament to her unwavering commitment to women's rights.

Harriet Beecher Stowe's novel 'Uncle Tom's Cabin' was a powerful indictment of slavery and its impact on individuals and families. The book's widespread popularity helped galvanize public opinion against slavery and contributed to the growing abolitionist movement.

Jacob Riis was a Danish-American journalist and social reformer who exposed the deplorable living conditions of the urban poor in New York City. His book 'How the Other Half Lives' and his photographs brought attention to the plight of the poor and led to reforms in housing and sanitation.

Jane Addams was a pioneering social reformer and co-founder of the Hull House in Chicago. The Hull House provided a range of services, including childcare, education, and healthcare, to the city's immigrant and working-class population.

Florence Nightingale, known as the 'Lady with the Lamp,' was a pioneer in nursing and healthcare reform. During the Crimean War, she led a team of nurses and revolutionized nursing practices, significantly reducing mortality rates among soldiers.

Charles Dickens was a renowned English novelist and social critic. His works, such as 'Oliver Twist' and 'A Tale of Two Cities,' vividly depicted the struggles of the poor and working class, shedding light on social injustices and advocating for reform.

William Ladd was an American peace activist and founder of the American Peace Society. He dedicated his life to promoting peace and international cooperation, advocating for the peaceful resolution of conflicts through diplomacy and arbitration.

Clara Barton was a pioneering nurse and humanitarian who founded the American Red Cross. During the Civil War, she organized relief efforts and provided medical assistance to soldiers on both sides of the conflict. After the war, she established the American Red Cross to provide aid during disasters and emergencies.

Elizabeth Fry was a British Quaker and prison reformer. She dedicated her life to improving the conditions of prisons and advocating for humane treatment of prisoners. Fry visited prisons, documented the deplorable conditions, and worked to implement reforms that focused on rehabilitation and education.

William Booth was a British Methodist minister and social reformer who founded the Salvation Army. The Salvation Army is a Christian organization that provides a wide range of social services, including food, shelter, and addiction recovery programs, to the poor and marginalized.

Robert Owen was a Welsh social reformer and utopian socialist. He dedicated his life to improving the working conditions of factory workers, advocating for fair wages, shorter hours, and safer workplaces. Owen also established cooperative communities, such as New Harmony in Indiana, to promote social and economic equality.

Roger Baldwin was an American civil liberties activist and co-founder of the American Civil Liberties Union (ACLU). The ACLU is a non-profit organization dedicated to defending civil liberties and constitutional rights, including freedom of speech, religion, and assembly.