The Culture of the Tamils is very old and stretches back to a Million years.
The scientific organisation of the society leaves one stunned.
Not only were they able to classify society on the basis of work performed , they classified the land mass into five regions, describing the unique characteristics of each.
They have been able to visualize the different climatic conditions of the world and explained them away.
They analysed the geographic peculiarities of each region, classified the habits of those who lived there and ascribed special name for each.
And special moral codes based on the environment was developed.
Strict moral code was applied and what is applicable to one region was not allowed n the other.
The division of land mass.
1. Kurinji-Hilly Terrain and those adjoining it.
2. Mullai, Forest region and those adjoin it.
3. Marutham,Paddy fields and areas adjoining it.
4 .Neydal, Seashore and adjoining areas.
5. Paalai,Desert and areas around them.
The latest classification by scientists is thus.
The Köppen classification depends on average monthly values of temperature and precipitation. The most commonly used form of the Köppen classification has five primary types labeled A through E. These primary types are A, tropical; B, dry; C, mild mid-latitude; D, cold mid-latitude; and E, polar. The five primary classifications can be further divided into secondary classifications such as rain forest, monsoon, tropical savanna, humid subtropical, humid continental, oceanic climate, Mediterranean climate, steppe, subarctic climate, tundra, polar ice cap, and desert.(wiki)
Except the Arctic region all the areas mentioned here seem to have been covered in Tamil Literature.
Now it is not possible to know all the climates,study and classify them if people do not live there .
They should have lived in all these regions, developed habits and formed them into classified knowledge.
Even to-day, in the present Tamil Nadu, people do not really know about the actual weather conditions elsewhere in India,where they live in smaller numbers,save through newspaper/TV reports.
Hence the land mass in which the Tamils lived before must have encompassed land masses containing the areas , regions about which the ancient Tamil literature speaks of.
This tends to go with the theory of Lemuria which was consumed by a giant Tsunami,was inhabited by the Tamils.
Mention of Dravida as those belong to the South of the Vindhyas , by the Vedic and Puranic literature confirms this.
Two American eminent geologists McKenzie and Sclater have clearly explained that Africa and South America were locked together as part of the primitive continent until about 200 million years ago.
The present formations of India, Arabia, Africa, Antarctica, South America and Australia started breaking up due to natural upheavals and moving to different parts of the earth at the rate of 15,000 years per mile on an average and found their places in the Asian Continent. The movement of the earth mass, called Navalam Theevu in Tamil, caused the formation of the present continent of India.
There was a general belief that both Lemuria and Kumari Kandam were one and the same. However, it has been established by Frank Joseph, Secretary for Ancient American Association, in his book “The Lost Civilization of Lemuria”, the existence of a land called Lemuria, one of the world’s oldest civilizations, about 2.5 lakh years ago, in Indonesia. Hence, Lemuria and Kumari Kandam, which existed in southern part of India, are different lands.
Mr. Joseph has also established that the Mohenjodaro letters of Eastern Islands are nearly 1,00,000 years old. He has critically examined the views of various scholars and established the source of Mohenjodaro letters as well as the ancient civilization of Moo and has written that due to natural calamities, the island of Moo was destroyed about 2.5 lakh years ago.
Eastern Island, 1,000 miles near Japan, has a script called Rongo Rongo and it is identical with Mohenjodaro letters. This has been fixed as 1,00,000 years old.
Please read my post Lemuria the home of the tamils,Ramayana, Mahabharata.