Is Non-violence relevant today?

How the word Non-violence came in to my mind.This is the important thing you might be thinking.Every year on 2nd 0ct we celebrate Gandhi Jayanti.We pay homage to the "Father of Nation" and we discuss lot about his principle's. But have we ever tried to put stress on his principles given by him ! His principle were based on Non-violence. Is his principal of Non-violence relevant today? Yes it is very much relevant in this current scenario. But many people would disagree by my view and would give the example of 'Terrorism'. How can be we deal terrorism with non-violence? We should try to find the root cause of the problem.Once we are able to find the cause we are able to solve the problem.Any problem can't be solved using violent method because once the violent method are used it will lead to more violence.The great example is Nelson Mandella who followed the principal of non-violence and acheived his goals.
But every coin has a brighter and a darker side, hence is the situation with non-violence.