One salient aspect that the Out of India theory states is that the subcontinent acted as a cradle for human civilization freshly out of Africa. It is natural that several groups of these early modern humans broke away from the major group travelling towards the subcontinent, forming hunter gatherer societies in Anatolia or Central Asia (probably the Arabian peninsula as well) in the process, they would obviously have developed a non Indo-European language system as well as a matriarchal lineage society as part of worshipping the panchabhoothas.AKalam wrote:<SNIP>
Of the super-group which arrived in the subcontinent (here the subcontinent includes all of South Asia + Sri Lanka + Burma + AFG + Iran + Tajikistan + Tibet + Kyrgyztan + Xinjiang), these did spread out over a vast area of land giving rise to all the proto-modern ethnic groups of today, if the settlers in AFG and Tajiks and Northern Iran became the proto-Eastern Europeans, then the settlers in Sri Lanka went on to become island-hopping Munda tribes (ancestors of diverse Andaman islanders, Maldivian natives, Jarawas, Pacific Islanders and Australian Aborigines and probably even Meso-American Mayas and ancient Peruvians).
Settlers in Xinjiang further moved out into plains of East Asia giving rise to Han, Hakka, Koreans and Japanese.
Settlers in NE India and Burma populated the rest of SE Asia.
Further ethnic breaks occured within these groups to form sub-groups in accordance with varying climatic and food/agricultural or nomadic/gatherer norms over thousands of years to give rise to todays races and ethnicities.
Of course, all this fits in relatively well with the bits and pieces of Rig Veda as well as reading and research from other threads as well as BR.
Another thing to remember is that language groups originated in areas often isolated from each other by geographical entities such as pristine forest and unconquered mountains. For those ancient people, nature was largely not tame. Hence proto-European languages could have originated in the same landmass without any contact or influence from Dravidian or Munda groups and vice versa. The Vedas were the only irresistable force which managed to cross and unify the entire subcontinent, it may be that the original intent of the Vedas was to unite the whole of humanity as one big Dharmic brotherhood/sisterhood regardless of migrational/breakaway tendencies of the outlying settler groups but that task somehow remains incomplete.
Added later: Rudradev ji, even the Stonehenge is supposed to be one of the first monuments constructed by Germanic tribes after crossing over to the British Isles and it is said to be a type of universal clock, showing the time difference between their current location and their original homeland, part of their cherished connection to the "cradle of civilization".