At the start of the 20th century, many parts of the world were colonies of European countries. As time went on most colonized areas gained their independence. However, in many places the voices of indigenous people have been ignored.
Indigenous people have begun to work together to gain Self-Determination in international organizations like the International Working Group on Indigenous Affairs (IWGIA). After lobbying the UN for 20 years, the UN adopted the Declaration on the Rights of Indigenous peoples, which confirms their right to Self-Determination.