The essence of the fundamental right to equal treatment: Back to the origins

Abstract

The principle of equal treatment is essential to the process of European integration. It is one of the main principles - if not the main principle - driving this process forward. Equal treatment between States and the prohibition to discriminate on grounds of nationality are indeed cornerstones of the European project. Furthermore, the principle of equal treatment is a fundamental right according to which comparable situations must not be treated differently, and that different situations must not be treated in the same way unless such treatment is objectively justified. This fundamental right has also been given more specific expression in a set of Treaty provisions and Directives prohibiting discrimination on grounds of sex, racial or ethnic origin, religion or belief, disability, age, or sexual orientation. Precisely because the principle of equal treatment performs several important functions in the EU legal order, it is shaped by several sets of actors: constituent powers, legislature and judiciary. The article first maps out the various functions that the principle of equal treatment fulfills in EU law, placing emphasis on the complexity of the relevant constitutional framework. This sets the floor for a critical discussion on how different institutional visions of the principle may compete, and a reflection of the role of the concept of 'essence' to articulate these competing visions.