Activism
- George Thorndike Angell, anti-animal cruelty activist
- Richard Barnet (1954), disarmament activist and co-founder of the leftist think tank Institute for Policy Studies
- Larissa Behrendt (LLM 1994), Australian aboriginal rights activist, novelist
- John P. Davis (LL.B. 1933), African American activist
- Charles E. Dunbar (LL.B. 1914), civil service reformer
- George Esser, civil rights advocate
- Sandra Froman, president of the National Rifle Association
- Jennifer Gordon, immigrant labor organizer
- Mark J. Green, public interest author, candidate for Senator from New York (1986), Mayor of New York City (2001) and New York State Attorney General (2006)
- Archibald Grimké, co-founder of the NAACP
- Marjorie Heins, free speech and civil liberties advocate
- Mary Howell (J.D. 1991), fought to open medical schools to women
- Irene Khan, Secretary General of Amnesty International
- Brink Lindsey, Cato Institute libertarian activist
- Hans F. Loeser (1950), anti-Vietnam War activist
- David A. Morse, winner of the Nobel Peace Prize for leadership of the International Labor Organization
- Ethan Nadelmann, anti-War on Drugs activist
- Ralph Nader, consumer advocate and frequent Green Party presidential candidate
- Basil O'Connor, polio research advocate and president of the American Red Cross
- Wendell Phillips (1934), abolitionist and Native American rights advocate
- Louis L. Redding (LL.B. 1928), NAACP lawyer and civil rights advocate; first African American admitted to the Delaware bar
- Randall Robinson, anti-apartheid and pro-Haitian immigrant activist; founded the TransAfrica Forum
- Harvey A. Silverglate, founder of the Foundation for Individual Rights in Education
- Silda Wall Spitzer, founder of Children for Children, former First Lady of New York State
- Moorfield Storey, president of the NAACP and the Anti-Imperialist League
- Nadine Strossen, president of the American Civil Liberties Union
- William English Walling, co-founder of the NAACP and founder of the Women's Trade Union League
- Evan Wolfson, civil rights attorney
- Alfred-Maurice de Zayas, human rights advocate and historian
Read more about this topic: List Of Harvard Law School Alumni