What are the main reason of success of federal system in India?

The creation of linguistic States was the first and a major test for democratic politics in our country. If you look the political map of India when it began its journey as a democracy in 1947 and that of 2017, you will be surprised by the extent of the changes. Many old States have vanished and many new States have been created. Areas, boundaries and names of the States have been changed. In 1947, the boundaries of several old States of India were changed in order to create new States. This was done to ensure that people who spoke the same language lived in the same State. Some States were created not on the basis of language but to recognise differences based on culture, ethnicity or geography. These include States like Nagaland, Uttarakhand and Jharkhand.