The humanity has come into the Third Millenium having lots of non-solved problems, barring and experiencing all consequences and results of severe wars of the previous centuries. It was right said that peace is the period of time between wars and according to the history of humankind those period never last long. We all know and realize what can wars result in further, then why do wars start? Why do people fight with each other at the bequest of our leaders using violent weapon and methods of combats? Who has the right to take the life of another?To answer those question first of all we have to give the definition to "War". One of the definition is as follows: War is an actual, intentional and widespread armed conflict between political communities. Force has always been a way of deciding who is right and who is wrong, whom should this or that land belong to, who is stronger and who is weaker. People differ from animals with their brain power, we are able to think and to contemplate, why then can't we solve conflicts without killing? And where are the roots of people fights?…