This article is a critique of ethnicity theories based on essentialism – the idea that ethnic traits are innate (essences) both in the individual and the ‘ethnie’ as a social group – which have been adopted, wittingly or unwittingly, by historians in mainstream Malaysian historiography in their effort to explain the formation of ‘Malay-Malayness’ as a social identity. It proposes instead that Malay ethnicity is not innate but rather learned or constructed, and Malay-Malayness has been created as a result of intersecting historical, cultural and social factors at a particular moment in a culture's life and history. Indeed, Malay-Malayness has been constructed by a colonial historiography and subsequently adopted uncritically by most historians in postcolonial Malaysia, both Malays and non-Malays.