Helen Adams Keller (June 27, 1880 – June 1, 1968) was an American author, political activist and lecturer. She was the first deafblind person to earn a Bachelor of Arts degree. The story of how Keller's teacher, Annie Sullivan, broke through the isolation imposed by a near complete lack of language, allowing the girl to blossom as she learned to communicate, has become known worldwide through the dramatic depictions of the play and film The Miracle Worker.

A prolific author, Keller was well traveled and was outspoken in her opposition to war. She campaigned for women's suffrage, workers' rights, and socialism, as well as many other progressive causes.

Helen Adams Keller was born on a plantation called Ivy Green in Tuscumbia, Alabama, on June 27, 1880, to Captain Arthur H. Keller, a former officer of the Confederate Army, and Kate Adams Keller, a cousin of Robert E. Lee and daughter of Charles W. Adams, a former Confederate general. The Keller family originates from Switzerland. Helen Keller was not born blind and deaf; it was not until she was nineteen months old that she contracted an illness described by doctors as "an acute congestion of the stomach and the brain," which could possibly have been scarlet fever or meningitis. The illness did not last for a particularly long time, but it left her deaf and blind. At that time, she was able to communicate somewhat with Martha Washington, the six-year-old daughter of the family cook, who understood her signs; by the age of seven, she had over sixty home signs to communicate with her family. According to Soviet blind-deaf psychologist A. Meshcheryakov, Martha's friendship and teaching was crucial for Helen's later developments.