Sarah Margaret Fuller (May 23, 1810 – July 19, 1850), sometimes referred to as Margaret Fuller Ossoli, was an American journalist, editor, critic, translator, and women's rights advocate associated with the American transcendentalism movement. She was the first American female war correspondent and full-time book reviewer in journalism. Her book Woman in the Nineteenth Century is considered the first major feminist work in the United States.
Born in Cambridge, Massachusetts, she was given a substantial early education by her father, Timothy Fuller, a lawyer who died in 1835 due to cholera. She later had more formal schooling and became a teacher before, in 1839, she began overseeing her Conversations series: classes for women meant to compensate for their lack of access to higher education. She became the first editor of the transcendentalist journal The Dial in 1840, which was the year her writing career started to succeed, before joining the staff of the New-York Tribune under Horace Greeley in 1844.