How can we bring peace in the country?

The question as written is unanswerable since the requirements to bring peace to any country in particular vary immensely based on what country we are talking about. Some countries have internal violence (which can have various motives from crime to ethnic/racist tensions to nationalist/secessionist aspirations to religious disharmony to fears about government resolution mechanisms). Some countries have corruption (another plethora of sources and possible effects). Some countries have antagonistic relationships with their neighbors which can have wildly different motivations (another plethora of sources and possible effects). Since these and other factors differ wildly between different nations, the way to bring peace will correspondingly differ.

Please resubmit the question clarifying which country or countries are being considered.