The Universal Declaration of Human Rights adopted by the United Nations in 1948 sets a common standard to ensure that all human beings are treated equally. The United Nations has advanced and supported democracy and democractic goverance through electoral assistance provided to over 50 countries since 2010 alone. The UN has assisted in milestone elections in many countries, including Afghanistan, Burundi, Cambodia, the Democratic Republic of the Congo, Iraq, Nepal, Sierra Leone, the Sudan, and Timor-Leste. The United Nations has formulated more than 80 treaties and declarations protecting and promoting human rights, for example, banning the participation of children under 18 in armed conflict and prohibiting the sale of children, child prostitution and child pornography.