After reading the Indian history, I came to know the different phases of India. The struggle for the India has been not now, since the ages of ages, it has been bifurcated, ruled, but still stood as an epic.
It was around 5000 to 2000 BC, we have proofs of urban culture in the place of Harrappa and Mohenjadaro. These were the only proof of places found till now for the present urbanization. Unfortunately, the roots of our India were in present Pakistan.
Later, the aryans came to India and there were drastic changes, they bought caste system and also this was the time where sanskrit(Indo-European) became the language, where derived from Indo-Iranian language.
At the other end, Brahmin became the upper caste of all, and also to put the mankind in the right path, the Vedas, the Puranas and the Upanishads came into existence and became the crowns of the Hindu religion.
Initially all the principles are in oral, and the Rig Vedas mostly not in easy learn way and which can be chanted by the Brahman only. Later, to make Vedas to be easily chantable and can be sing and pray in Sama Veda. The Yajur Vedas deals with the human rituals and sacrifices. Atharvana Vedas are magical incarnations. I believe the 'KALLAs' has been emerged from this veda.
After the vedic period, the Hinduism cost the own religion and testified due to the breakthroughs in culture. The new religions born after the Hinduism namely Buddhism, Jainism etc.
At the other end of the land, dravidian culture has been on it's peak, the cheras, the cholas, and the pandyas, along with the vijayanagaram Kingdom ruled the southern part of India. Tamil language, has been rooted from the southern part, which is indigenous to India. Other languages too rooted from the Tamil and on the years, all the languages has been clustered with Sanskrit, Pallavas incepted sanskrit into Tamil, Telugu has been formed from the conglomeration of Tamil and Sanskrit. The base script for Kannada and Telugu are same like Malayalam and Tamil.
The Mauryans, Guptas, Pallavas, Delhi Sultans, Vijayanagaram Empires, Mughals, Marathas, Sikhs, Raj puts, British have been ruled the India. Each empire has been given their best.
The Mauryans, (Asoka) has been tremendously scattered the Buddhism throughout the world.
The Guptas has promoted the great people like Kalidasa(Shakuntala), Aryabhata(invented 0) and Vatsayana(Kamasutra).
Pallavas ruled most of the southern India from Kanchi, Nellore districts and more temples established in and around. Rock cut temple of Mahabalipuram is one of their work.
Delhi Sultans, influenced the sanskrit, due to their different origins of Turkish, Persian and Arabic.
Vijayanagaram Empire, has increased the Telugu language status to its peak.
Observed that people divided into devotees of Shiva and Vishnus. Not sure from which period.
Mughals, built one of the nine wonders, Taj Mahal. And also introduced the Persian art and cuisines to India.
Marathas, given the great warriors like shiva ji, Baji Rao(all the 41 battles won)
British, laid the railway system and introduced many more systems.
Now the India is stood on its own freedom.
Note : All the information has been based on my understanding of the history of India. Forgive for the mistakes.