Ellen Karolina Sofia Key (; 11 December 1849 – 25 April 1926) was a Swedish difference feminist writer on many subjects in the fields of family life, ethics and education and was an important figure in the Modern Breakthrough movement. She was an early advocate of a child-centered approach to education and parenting, and was also a suffragist. She is best known for her book on education (1900), which was translated into English in 1909 as The Century of the Child. Biography Early life Ellen Key was born at Sundsholm mansion in Småland, Sweden, on 11 December 1849. Her father was Emil Key, the founder of the Swedish Agrarian Party and a frequent contributor to the Swedish newspaper Aftonposten. Her mother was Sophie Posse Key, who was born into an aristocratic family from the southernmost part of Skåne County. Emil bought Sundsholm at the time of his wedding; twenty years later he sold it for financial reasons. Key was mostly educated at home, where her mother taught her grammar and arithmetic and her foreign-born governess taught her foreign languages. She cited reading (The Official's Daughters, 1855) by Camilla Collett and Henrik Ibsen's plays (Love's Comedy, 1862), Brand (1865), and Peer Gynt (1867) as her childhood influences. When she was twenty years old, her father was elected to the Riksdag and they moved to Stockholm, where she would capitalize on the access to libraries. Key also studied at the progressive Rossander Course. 1870s After a correspondence with , who wrote (The Protestant Cult of Mary, 1874), she had written a review of the book for a periodical, under the pseudonym Robinson. His book gave her thoughts structure, helping to define her beliefs concerning the role of women as mothers and nurturers. Key hoped Feilitzen would leave his wife, as they did not share similar interests, but he refused. In the summer of 1874, Key traveled to Denmark and studied their folk colleges. Folk colleges were institutions of higher learning for young people from the countryside. One of her early ambitions was to found a Swedish folk high school, but instead she decided, in 1880, to become a teacher at Anna Whitlock's school for girls in Stockholm. Shortly after she moved to Stockholm, she befriended Sophie Adlersparre, who was the editor of Tidskrift för Hemmet (Journal for the Home), founded in 1859 by Adlersparre and Rosalie Olivecrona. In 1874 published her first