He used his experiences from the past actions which caused constructive tension in society. An example was the bus-boycot which was caused by refusing the afro-americans to seat in front of the busses. One black woman was aressted because braking the rule. As a contrareaction was that people stopped using the public transportation of those companies. The afro-american people were the majority of clients of those companies. These boycots caused great financial losses. The negotiations connected with problems of discrimination reached a positive point and the discrimination rules were canceled. King expresses that influence of outisiders in dealing with problems of insiders is important because outsider can find the right solution for particular situation. World is often confronted with situations which led to the horrible problems, where outsiders were the only one means of preventing from catastrophe. These conflicts are of military character, where the coming of outsiders can mean reduction of tension between the fighting groups. As an example are events which took place in Kosovo in the year 1998. The Serbian army had started an action of ethnic cleansing-destroying villages, killing people and other atrocities. Serbs police attacked protesters in Pristina, the Kosovar catpital, where many people were injuried and a great number of them died. Yugoslav President, Slobodan Milosevic did not accept international warnings to end violence and ethnic cleansing (Yugoslavia, 1998). Continual damaging of villages and prosecution of inhabitans had caused that 300-400,000 people had lost their homes and other properties. Those violent military actions of Serbians had to be stopped for they were causing instability of the whole country. The goal of the NATO was to convince Milosevic to cease his unhuman acting (War in Europe). After coming of the NATO`s army the soldiers started direct protections of Kosovar Albanians from Serbian army. They had gathered to the areas inhabited by Kosovar Albanians and they created a border between the both sides. There was very important to stop brutal treatment of Serbian soldiers to Kosovar Albanians. Without entering of an outsider to the conflict, there would not have been found a way how to deal with the problems of the insiders. NATO as an outsider had become important part in dealing with problems of Kosovar Albanians. On the other hand, in some situations, the outsiders can cause increase of negative tension, and the result of it is a more critical situation of the local community as before.