Human rights in Muslim-majority countries
When the United Nations adopted the Universal Declaration of Human Rights (UDHR) in 1948, Saudi Arabia refused to sign it as they were of the view that sharia law had already set out the rights of men and women. To sign the UDHR was deemed unnecessary. What the UDHR did do was to start a debate on human rights in the Islamic world. Following years of deliberation, the Organisation of the Islamic Conference (OIC) adopted the Cairo Declaration of Human Rights in Islam.
History of slavery
The 1926 Slavery Convention, an initiative of the League of Nations, was a turning point in banning global slavery. Article 4 of the Universal Declaration of Human Rights, adopted in 1948 by the UN General Assembly, explicitly banned slavery. The United Nations 1956 Supplementary Convention on the Abolition of Slavery was convened to outlaw and ban slavery worldwide, including child slavery. In December 1966, the UN General Assembly adopted the International Covenant on Civil and Political Rights, which was developed from the Universal Declaration of Human Rights. Article 4 of this international treaty bans slavery. The treaty came into force in March 1976 after it had been ratified by 35 nations.