Origin of Shiva, the God of Phallus
Wiiliam Jones, a Judge serving in Kolkata in British India, who knew Greek and Latin from his schooldays, and had learned Sanskrit, the language of ancient Indian religious texts. In 1786, he observed : "The Sanskrit Language, wherever may be its antiquity, is of a wonderful structure; more perfect than the Greek, more copious than the Latin, and more exqusitively refined than the either, yet bearing to both of them a stronger affinity, both in the roots of verbs and in the form of grammer, than could possibly have been produced by accident; so strong indeed that no philologer could examine them all three, without believing them to have sprung from some common source, which, perhaps, no longer exists." For more than two hundred years, sholars have puzzled over how such a similarity of languages developed over so vast a region.
From "Who We Are and How We Got Here" - By David Reich
Kindly note that Adivasis don't worship Shiva. They are austroasiatic language speakers who don't worship phallus. This worship of phallus originated in Harappan Civilization (Indus Valley) which got transmitted to Dravidians after the intermixing of Harappans with First Indians located in the ancient times in the South of India more than 4,000 years ago. Adivasis of Jharkhand are the result of inter mixing of First Indians and the migrants from Chinese region of today's Cambodia and Vietnam.
Those who are interested in this branch of knowledge may come to my office and read these along with many others but no book can be shared for taking home.
1. Aryan & Non-Aryan in South Asia: Evidence, Interpretation & Ideology by Bronkhorst, Johannes.
2. The Horse, the Wheel, and Language: How Bronze-Age Riders from the Eurasian Steppes Shaped the Modern World by Anthony, David W.
3. The Language of History: Sanskrit Narratives of Muslim Pasts by Truschke, Audrey
4. Early Indians: The Story of Our Ancestors and Where We Came From by Joseph, Tony
5. Aryans, Jews, Brahmins : Theorizing Authority through Myths of Identity by Dorothy M. Figueira
6. Who We Are and How We Got Here: Ancient DNA and the new science of the human past by David Reich and and Gyanendra Man.