Many factors are there for promoting national integration. They are: 

1. Secularism: Our nation is a secular country. This means that every citizen enjoys the freedom to practise the religion he desires. India has not declared any religion as the national religion but treats every religion equal as equal. 

2. Democracy: India is a democratic nation and treats all citizens equal before laws. There can be discrimination among the people on the basis of religion, caste, language or culture. Our constitution makes our country an integrated one. 

3. National festivals: Our National festivals like Independence Day, Republic Day, Gandhi Jayanthi bring people together during their celebrations. All over India, these festivals are celebrated on irrespective of the case, religion, language and culture. 

4. Our National Symbols: Our national symbols like the National Anthem, National Flag, National Animal, The national bird, National flower, etc. enable us to identify ourselves as belonging to one nation, India. These symbols, during the times of emergency or threat to the country, unite the people and build solidarity among them. 

5. Interdependence: The central government and state government work together to achieve the common goals of the nation. Produce grown in one part of the country helps in its economic development when that product is sold in another part of the country. This shows that all of us belong to one nation. 

6. Apart from these, above-mentioned factors, communication methods, mass media, natural features contribute to a feeling of oneness, though there is a variety of cultures, different religions, languages, regionalism in our country.