Why, even, various developed countries faced Coup D'etat, Dictatorship and/or Civil War but India didn't?

I appreciate the answer of User 833. I would like to add a point or two. Being an Indian myself - I know that for Indians there is inbuilt lethargy to move towards a revolution. We as a people are content to change slowly not abruptly.

However historically there have been revolutions not in the sense of French Revolution or the October Revolution, but a revolution nevertheless. In June 1975, the Indian PM Mrs.Gandhi used the provisions of the Constitution to declare a state of Emergency wherein Individual Freedoms and Rights were abrogated - it was a dictatorship much like Stalin - any critic would face a midnight knock and be imprisoned without recourse to a court of law - yes they were not liquidated - that is the only difference.

The imposition of emergency was preceeded by a movement by the Gandhian Jai Prakash Narayan who felt the dreams of the Constituent Assembly was being ignored amidst growing nepotism and corruption. When the emergency was lifted Indian National Congress faced a new opponent in the polls declared. Prior to 1975 India was a a land of multiparty elections. This resulted in the Anti-Congress vote being split and the Congress emerging winner in election after election. During Emergency 14 or 15 different parties united to form a new party Janata Party. There was co-operation with the left parties too - Communist Party of India fought the elections unitedly and CPI's Indrajit Gupta became the Indian Home Minister. This unity wiped out Congress Party including Indira and her son Sanjay Gandhi from North India - the Congress Party is still to recover its sway over this region.

However the experiment was a failure and the Janata Party broke up before 1980 due to internal differences.

This can be really termed a revolution in India through the ballot not bullet.

Earlier in 1967 the Dravidian Parties in the state of Madras won a resounding victory over Congress Party and till date thee State of Madras (now Tamil Nadu) has not seen a Congress Government for more than 50 years.

This is just additional information to state that India does have its non-violent revolutions, but they are far and few. Many of them like Anna Hazare's movement collapse due to their inherent internal fault lines.

Actually, I don't think there's ever been a very long period in Indian history where the country was united and was undergoing no civil wars.

Just since the end of the British era, there's been the Pakastani partition (a civil war/diplomatic war/war that eventually split the country in two, or three depending on how you count), the Tamil rebellion, and a more or less continuous ongoing low-level rebellion in Kashmir.

First of all, there was a period of dictatorship in India, Indian Emergency of 26 June 1975 – 21 March 1977 and, after that, there was a minor civil war with the Sikh minority. There was also considerable religious unrest during the formation of the nation. So, I wouldn't say that Indian culture precludes these political activities.

I would say that one major reason was the nature of the world during the bulk of India's history, namely, the Cold War and India's strategic location. It was in the interest of both the US and USSR to have a stable government in India where neither side had an upper hand. Therefore, there were no significant outside influences pushing for radical changes as there was in China and other countries.

Another factor was that India was underdeveloped and there was a great desire to see economic improvement. Having a stable, mostly democratic, government with good rule of law and protection of property rights is the best way to achieve this goal. India's leadership knew this and, but for a few exceptions brought on by typical human failings as I noted above, they've headed in this direction.

One reason could be the numerical size of the diversity present in thought and culture within India which keeps pulling the nation in different directions and acts as a check to the momentum any dramatic activity within the system generates. Coups, Dictatorships etc may appear to be driven by one man but they are brought about by a collective feeling within a number of people. Such a collective feeling is never allowed to gain strength in India because the inbuilt diversity prevents any one group from gaining the upper hand.

Its virtually a norm in India that whatever happens, there is always a sizeable group criticizing it, and a sizeable group praising it. The key thing here is "the size". By sheer numbers it is enough to generate its own momentum and act in opposition to the current trend. A recent anti-graft movement led by the social activist Anna Hazare is an example. Initially it appeared as if "Team Anna" had brought the government on its knees but then the movement cooled down.