The principles of equality and non-discrimination lie at the heart of international human rights law. They are the only human rights explicitly included in the UN Charter and they appear at the beginning of virtually every major human rights instrument. This volume contains selected works by leading authors on the subject of equality and non-discrimination under international law. The selections are grouped into four sections. The first presents essays that explore theoretical concepts of equality and non-discrimination. The next addresses the development of international legal standards on the subject. The third presents articles analyzing how those standards have been interpreted and applied by UN and regional human rights bodies, and the last contains works on what measures besides legal action States are to take to in order to achieve equality and non-discrimination.