 The "Declaration of the Powers, on the Abolition of the Slave Trade, of 8 February 1815" (Which also formed of the Final Act of the Congress of Vienna of the same year) included in its first sentence the concept of the "principles of humanity and universal morality" as justification for ending a trade that was "odious in its continuance".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.