Mahatma Gandhi preached ahimsa or non-violence and truth as the tools for peaceful resolution of issues between people, communities or countries. Over the years, as science and technology progressed, so did man's inherent greed for power and wealth, along with increased hostility between various groups of people in the world . Contrary to the hope of the integration of population across the globe into a "World Community", in harmony with each other, which was expected as a result of development, war and internal conflicts have plagued the world, causing immense suffering to vast number of people. Terrorism has become a common in certain areas of world, including parts of India. In these area, children live in constant fear of attacks and violence. Often they do not attend formal school and don't lead normal lives.
hope it helped u :)