The first effective attempt to promote children's rights was the Declaration of the Rights of the Child, drafted by Eglantyne Jebb in 1923 and adopted by the League of Nations in 1924. On 20 November 1959, the United Nations General Assembly adopted a much expanded version as its own Declaration of the Rights of the Child, with ten principles in place of the original five. The United Nations Convention on the Rights of the Child (UNCRC) was the first legally binding international instrument to incorporate the full range of human rights, describing child-specific needs and rights. These human rights included civil, cultural, economic, political, and social rights, as well as aspects of humanitarian law.The UNCRC was signed in 1989, and entered into force in 1990. As of May 2010, it had 193 parties which had ratified, accepted, or acceded with stated reservations or interpretations, including every member of the United Nations except Somalia and the United States, which have only signed.