The research done by Fr. Heras and Sir John Marshall the Archaeologist and other scholars into the archaeological finds at Mohenjodaro and Harappa point to the existence of an earlier highly developed Dravidian civilization in the deep South, which had influenced the Indus Valley Aryan civilization of the North.
The available historical evidence referring to the Dravidian civilization commences with the records that have come down to us of the Tamil literary writings during the past 12,000 years, which have been divided by historians into three periods, called the First Sangam period from 9600 BC to 5200 BC, spanning the Satya and Treta yugas, the Second Sangam period from 5200 BC to 1500 BC spanning the Treta and Dwapara yugas, and the Third Sangam period from 1500 BC to 600 AD spanning the Dwapara and Kali yugas.
According to the present cycle of four yugas, namely Satya, Treta, Dwapara and Kali yugas, in their descending arc of 12,000 years and ascending arc of another 12,000 years, as stated by Sri Yukteswar in his famous treatise called “Holy Science”™, we are now in the ascending arc of Dwapara yuga completed the Kali yuga period lasting from 600 BC to 1800 AD.
The Mahabharata war, where Lord Krishna propagated the teachings of the Bhagavad Gita to Arjuna, is reckoned to have taken place during the Second Sangam period about the year 3100 BC.
The First Sangam, which was founded and nurtured by Siddha Sri Agastiyar, lasted for 4,400 years and had its centre in the city of Dakshina Madura in the continent of Lemuria.
The Second Sangam, which was also established under the patronage of Sri Agastiyar, lasted for 3,700 years and had its centre in the city of Kavatapuram in the continent of Lemuria, after the records in the city of Dakshina Madura had gone under water.
The Third Sangam, also sponsored by Sri Agastiyar, lasted for 1,800 years and had its centre at Uttara Madura, namely the modern city of Madurai, which lays north of the earlier centres, after the whole of the Lemurian continent had gone under water.
After the commencement of the gradual inundation of the Lemurian continent, it is reported that Sri Agastiyar led a migration of Dravidians to Java and Cambodia and Central and South America. The legends of the Incas, Mayans and Aztecs of South America regarding the founding of their cultures by tall beared white-robed teachers confirm the tradititional view that the Lemurians, under the guidance of their siddhas, colonized North and South America, as well as the Nile Valley, when they founded the Egyptian civilization.
It is significant to note that Edgar Cayce the well-known ‘sleeping prophet’ of America, had in the course of his recent voluminous psychic messages given out by him while in a state of trance mentioned a similar sinking of the continent of Atlantis in stages into the Atlantic Ocean over a period of several centuries between 12,000 BC and 10,000 BC, before the sinking of the Lemurian continent.