"The best way we can define ourselves is as a multi-source civilization, not a single-source one, drawing its cultural impulses, its traditions and its practices from a variety of heredities and migration histories. The Out of Africa migrants, the fearless pioneering explorers who reached this land around sixty-five millennia ago and whose lineages still form the bedrock of our population; those who arrived from West Asia and contributed to the agricultural revolution and the building of the Harappan Civilization which then became the crucible for new practices, concepts and the Dravidian languages that enrich much of our culture today; those who came from east Asia, bringing with them new languages and plants and farming techniques; and those who migrated here from central Asia, carrying an early version of what would become a great language, Sanskrit, and all its associated beliefs and practices that have reshaped our society in fundamental ways; and those who came even later seeking refuge or for conquest or for trade, and then chose to stay - all have mingled and contributed to this civilization we call Indian. We are all Indians. And we are all migrants."