This study engages the historiography on the Aryan Invasion Theory (AIT) by tracking a range of historical works that have explored the use of the AIT in the connected contexts of Europe, British India, and Iran. By noting critical scholarly evaluations of the use of AIT in these contexts and bringing them into dialogue with each other, the study highlights the general scholarly consensus on the contradictions, inconsistencies, lack of historical evidence, and agendas of colonialism and chauvinistic nationalism characterizing AIT in the eighteenth, nineteenth, and twentieth centuries. I particularly focus on the use of AIT in British India and contemporary Iran during the above-mentioned period in the heterogeneous writings of colonial officials, anthropologists, archaeologists, philologists, philosophers, and political leaders, among others. I demonstrate how this historiography on the AIT argues that geographical and temporal evidence on AIT is confused, misleading, and often purely crafted by racist imperatives without a substantive historical foundation.