Estelle, you need to make your questions more detailed, instead of simply writing 'Indian Culture'. Like Dazug says, you could mean North American Indian, Meso American, Carib or subcontinental Indian.
I'm going to assume based on your earlier posts that you mean the Indian subcontinent, and the nation of India in particular as opposed to Pakistan or Bangladesh. It may be that the pantheistic approach of Hinduism was established at this time.
Firstly, the great river valleys of the Indus (which now flows mostly through Pakistan) the Saraswati (a lost river that flowed to the east of the Indus and the upper Ganges are locations of the earliest civilisations of the subcontinent, dating at theor first peak to around 2400 BC and easily parallel to events in the Nile Valley and ancient Iraq. See
https://www.harappa.com/ for more.
Around 1000 BC a wave of new settlement brought Indo-European speakers and the Sanskrit language, along with chariots and certain rituals, described in the Rig Veda. As yet it's unknown how these relate to the earlier civilisations of the zone. But the new settlers again developed a considerable civilisation, from which the story of Prince Siddartha / Buddhism emerged.
In the 1200s AD an invading force of Mongol / Mughal invaders from north of the Himalayas took control of the richer parts of the subcontinent, and established a new parallel religion, Islam. As with their Arab counterparts, the Mughals developed a reputation for scientific enquiry and have left some amazing monuments of this such as Jantar Mantar
https://en.wikipedia.org/wiki/Jantar_Mantar_%28Jaipur%29
From the 1600s Europeans began establishing outposts in India and gradually destabilised local regions, ultimately leading to the temporary government of the whole subcontinent by Britain, roughly 1870 to 1948
So that's a bit of a timeline to base your assessment of Indian culture. Next time you shampoo, sit on a verandah, or see a bungalow remember you're using Hindi words - Indian culture has influenced the English language.