43. Evolution of Tulu Language

I propose a three stage evolution of Tulu language. Other Dravidian languages also share this global heritage.
Stage I: ca.4000-2000 BC - Proto Tulu
Proto Tulu originated in Ethiopia. It contained lot of words derived from Sumerian languages and African languages. Some of these words still survive in our language. Other Proto-Dravidian languages also were originated in the region.
Around 2000 BC severe desertification of northern Africa occurred with formation of Sahara desert. The adverse environmental conditions forced many human tribes to leave Africa and migrate to greener areas with basic amenities. Tulu and other Proto Dravidian tribes left Africa and migrated.
Stage II: ca.2000-500 BC - Early Tulu
Migrating Tulu tribes and proto-Dravidians settled in the Pirak region in Central Asia, now part of Pakistan. Pirak region had a native language: Early Prakrit. They interacted with Indo-Aryans that came from Eastern Iran. A group of Indo-Aryan sages were engaged in the oral composition of Vedas. Early Tulu and Dravidians tribes learnt rice cultivation in this area. Again unfavorable environmental conditions enticed these Tulu/Dravidian tribes to migrate into greener pastures of India.
Stage III: ca.500-300 BC - Tulu
Early Tulu and Dravidian tribes migrated into India. They traveled and settled for some time in different regions of northwestern India, interacted with local language groups and further migrated to West coast of India. Interaction of Dravidian tribes with Marathi tribes contributed exchange of words between Dravidian and Marathi. Marathi language is an evolved form of Early Prakrit.
Tulu tribes settled in Karavali region that is popularly known as Tulunadu. Early Kannada tribes settled in plains of Karnataka. (The names Kannada and Karnataka may have evolved later.) Early Malayalees traveled further south and settled in Malabar. Tamils moved further and settled in Early-Madhurai, somewhere in the southern coast of India. The Early-Madhurai was destroyed by the transgression of the Sea and Tamils resettled in inland townships designated again as Madhurai.
At that time Munda group of languages and culture prevailed all over southern India. Munda tribes were adept in agriculture.They were growing a variety of crops like wheat, barley, jowar, ragi, cow pea (kadale), black gram (urd), green gram (padengi), horse gram (kudu), togari etc. The incoming tribes interacted with Munda tribes leading to assimilation of Munda language and culture in Tulu and other Dravidian languages and culture. Dravidian groups introduced rice cultivation methods acquired from their earlier settlements.
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