The nature of Indian society has been Pluralistic, which refers to a society where distinct ethnic and cultural groups, various languages, religions have been flourishing together for a long time.
In our ancient India, we did not notice communal conflict or ethnic conflict because Indian culture always followed the concept of Vasudhaiv Kutumkam (Entire World is family).
Pacific Nature of Indian Society during the different time period:
The nature of Indus society was also pacific because we did not recover arms on a large scale on the excavation of any site.
Even though, because of the lack of natural boundaries in the Gangetic field, we see evidence of political conflict and many wars during the Vedic period and 6th century BC, but we do not have any single evidence of genocide. Despite the absence of any international authorities, there were several laws of war that had to be followed by society.
Buddhism and Jainism taught the world the Principle of Non-Violence (Amhisa) and prevented India from unnecessary wars.
Asoka’s Dhamma also gives the preach of Peaceful Coexistence
Megasthanies, faiyan, Huentsang and other foreigners, they never described non-humanitarian incident or any communal conflict or ethnic conflict in Indian society
Even though, during medieval India, we do not have the evidence of ethnic conflict and communal conflict in society (Neglecting some incidents of genocide by foreign invaders)
Thus we see, our society always have followed the concept of “Sarve bhavantu Sukhina” (everybody should be happy).