European scholars following Max Muller in the nineteenth century decided that the Vedic people - whom they called the Aryans after a misinterpretation of that Vedic term - invaded India around 1500 BC. They were said to have overthrown the primitive and aboriginal culture of the time, which was thought to be Dravidian in nature, and brought a more advanced civilization to the land (though they themselves were still regarded as barbarians). The indigenous aborigines were identified as the Dasyus or inimical people mentioned in the Vedas.

The rationale behind the late date for the Vedic culture given by Muller was totally speculative and based only on linguistic grounds. Muller had assumed that the five layers of the four Vedas and Upanishads were each composed in two hundred year periods before the Buddha at 500 BC, as they were in existence by that time.

However, the rates of change for languages are quite speculative, particularly for those languages, like Sanskrit or Latin which became scriptural or scholarly languages apart from common dialects. There are more changes of language within Vedic Sanskrit itself than there are in classical Sanskrit since Panini, regarded as a figure of around 500 BC, or a period of 2500 years. As classical Sanskrit has remained the same for that time period, the two hundred year strata for the Vedic language carries no weight at all. Each of these periods could have existed for any number of centuries and the two hundred year figure is likely too short a figure.

The idea that the Aryans were a particular race was not accepted by everyone. Max Muller himself rejected it. Yet it has become ingrained in the Aryan theory so much that the common mind has accepted it as a fact. This idea of the Aryans as a particular race, speaking a particular language I call the "first birth" of the Aryan theory. Yet in its first form the Aryan invasion was of people who were as or more advanced in culture than the indigenous aborigines that they overcame.

Harappa and Mohenjodaro were not excavated until the early part of the twentieth century. As by this time the 1500 BC date for the Vedic people was accepted and since Harappa dated before this it was uncritically accepted that the Harappan culture must be pre-Vedic. The Aryan invasion theory was rewritten to make the Aryans the uncivilized destroyers of the civilized Dravidian-Harappan culture. Yet few questioned this rewriting of the Aryan invasion theory in light of new evidence. This we could call the "second birth" of the Aryan invasion theory - in which the Vedic Aryans were not only violent and intolerant but the destroyers of one of the great civilizations of antiquity - which makes the Vedic Aryans appear as proto-Nazis. This is the view of the Aryan invasion that is most commonly accepted today, even after it has been accepted by all scholars that there is no evidence of any Harappan cities being destroyed by invaders. Because it is the most negative view of the Aryans, it has been most seized upon by those opposing Hindu or Vedic culture.

Meanwhile other archaeologists in the early part of this century pointed out that in the middle of the second millennium BC, various Indo-European appear in the Middle East, wherein Indo-European Hittites, Mittani and Kassites conquered and ruled Mesopotamia for some centuries. A Greek invasion of Europe was also postulated for this period, as it marked the period when the Minoan culture declined, which was assumed to be non-Indo-European. Hence an Aryan invasion of Greece and the Middle East was proposed. An Aryan invasion of India was regarded as another version of this same migratory movement of Indo-European peoples around the middle of the second millennium BC, which became one of the most dramatic migrations in the history of the world and for which no real cause has ever been given.

On top of this, excavators of the Indus Valley culture, like Wheeler, thought they found evidence of destruction of the culture by an outside invasion, confirming the idea (though Wheeler's so-called skeletal evidence of the massacre of Mohenjodaro has long since been refuted it still appears in many historical accounts even today!).

Vedic culture was thus said to be that of primitive nomads who came out of Central Asia with their horse-drawn chariots and iron weapons, like the Indo-European Hittites in the Near East who were among the first to use iron weapons, and overthrew the cities of the more advanced Harappan culture, with their cruder culture yet superior battle tactics. It was pointed out that no horses, chariots or iron were discovered in Harappan sites, and since such things are mentioned in the Vedas, this culture must be pre-Vedic.

To support this theory other aspects of the Vedas were molded according to it. Vedic references to destruction of cities were related to Harappa. The Vedic metal ayas was said to be iron, though it is only a generic term meaning metal. Vedic references to the ocean were reduced to mean only the Indus river or some other large body of water in northwest India or Afghanistan. Vedic references to rivers from the Indus to the Ganges, which are merely a list of rivers, were interpreted to show a movement from the west to the east of India. The Aryan invasion theory was imposed on archeological and literary evidence, even if it required altering the data.

This was how the Aryan invasion theory formed. The logic was inevitable. Once the image of invading Aryans was formed, it had to be drawn out to its ultimate form envisioning the Aryans like Atilla the Hun.