radical - a person who has radical ideas or opinions

Bakunin, Mikhail Aleksandrovich Bakunin, Mikhail Bakunin - Russian anarchist; ally and later opponent of Karl Marx (1814-1876)

Emma Goldman, Goldman - United States anarchist (born in Russia) who opposed conscription; was deported to the Soviet Union in 1919 (1869-1940)

Kropotkin, Prince Peter Kropotkin, Pyotr Alexeyevich Kropotkin - Russian anarchist (1842-1921)

Nicola Sacco, Sacco - United States anarchist (born in Italy) who with Bartolomeo Vanzetti was convicted of murder and in spite of world-wide protest was executed (1891-1927)

Benjamin Ricketson Tucker, Tucker - United States anarchist influential before World War I (1854-1939)

Bartolomeo Vanzetti, Vanzetti - United States anarchist (born in Italy) who with Nicola Sacco was convicted of murder and in spite of world-wide protest was executed (1888-1927)