"Ethnicity is as popular as it as ever been as a subject for study in the social sciences. However, due in part to its popularity ethnicity has become an unwieldy concept and currently suffers from both polysemy – whereby it has multiple definitions – and synonymy – whereby it is close in meaning to other terms like “nation” and “race.” Here I propose a new definition of ethnicity that is based on three core elements, namely common descent, a common history and a common homeland." (Quoted from paper)