Why is there a hue of skin colors among Indians?

In my previous post I indicated that there was a massive Immigration of peoples from the North to the South around 1500 BC.

Anthropologists and Geneticists say that people from the arid steppe lands of Central Asia or West Eurasia (the present day Kazhakstan at 45 N parallel and 60 South) migrated into India from the North West around the time the Fall of the glorious Indus Valley Civilization. Perhaps, these people were looking for fertile lands to grow crops. India provided this with perennial rivers of Indus, Ganges, Brahmaputra, Narmada, Cauvery etc with deep oceans all around for fishing...

What's not clear is whether these people from the North (some historians call them as Aryans) were responsible for the Fall of the Indus Valley Civilization or it happened because of natural disaster of some kind. It has been a puzzle for many historians and anthropologists.

These new immigrants from the North West spoke distinctly a different language (called Indo-European type as opposed to the Indo-Dravidian type) called Sanskrit and were having low melanin pigment in their skin (like the "White People).

These people are the Vedic people who wrote Vedas, the Holy Book of the present day Hindus in India around 3500 years ago.  Before the arrival of this Vedic people, Indians were worshiping Nature (like Sun, Moon, Sea, Rain etc); there is evidences of prevalent Shaktism - the practice of worshiping a Female God (Divine Mother God). And a few were worshiping Shiva lingam in the ancient pre-Vedic India.

These Vedic people started inter-marrying the dark skinned people of India for at least the next 2000 years. So much so after multiple generations of cross marriages, what we have in India is people with a hue of skin colors, which is prevalent in the middle States of India today: People in Kashmir look very similar to people in Kazhakstan and people in the Kanyakkumari district in down South look very much alike people in Kenya or the aboriginal Australians.In between, you will see different shades of skin color among Indians.

This skin color difference has posed enormous political and social problems in India. Some politicians divide Indians as pure Aryans and Dravidians - one came from outside India and other the aboriginals of India, respectively.  This is very divisive and totally unnecessary because over 2000 years or so, there has been complete mixing of the genes responsible for melanin, thus creating mixed pool of genes/alleles in the "Indian genome".

Thus most Indians are of mixed genome as far as the multiple genes responsible for the synthesis, processing and loading of melanin under the skin and its maintenance and degradation are concerned. I consider myself  a Dravidian, sporting a dark brown color (like President Obama, who is the son of a Kenyan father and a White American mother - a mutt, as he calls himself), while my mother and my maternal grandmother looked more " fair colored" or "White".

This is to say that each family has members who sport darker AND  lighter skin, meaning every Aryan has Dravidian in him or her, or every Dravidian has an Aryan in him or her genetically speaking.

In Tamil Nadu we have political parties of DK, DMK and AIADMK, who all practice Dravidian Ideology as opposed to most other  Southern States.

For the aforementioned reasons, it is not correct to dwell on Dravidian Ideology in the present time.

I will write about Religions in India and their consequences in the Social and Economic life,  later....

Cheers.