The word "conflict" has very negative connotations. However it is important to remember that "conflict," like the word "transformation," can be either positive or negative, depending on the result. For example, If the conflict results in the oppression of a person or group, then it is bad. But if it transforms perspectives and facilitates new beneficial agreements, then a conflict is a good thing.
World War II was a terrible conflict that claimed millions of lives. However, as a result of this war, there now exists the North Atlantic Treaty Organization (NATO), which has strengthened diplomatic and militaristic ties among Western nations, thereby securing their collective interests. This doesn't suggest World War II was a good thing; it only makes the point that conflicts often have positive and negative results.
One constructive aspect of conflict is that it can lead to new and better ideas. If person A has an idea, and person B has another idea, and they both want their ideas implemented, then the conflict between them forces them to identify the good and bad characteristics of both their ideas. Out of this conflict, they may be able to come up with a third idea that contains the best of both worlds. Another constructive aspect of conflict is that long-standing issues between individuals or groups can be addressed. Some tensions never get addressed because no practical opportunity exists to bring up the problematic issues. Conflicts provide an opportunity to clear things up for good.
One destructive aspect of conflict is the domination of one individual or group over another. If one party has more money, more education or more people on its side, then this party can simply brush the other one aside, thereby eliminating a potentially valuable resource. Another destructive aspect of conflict is the polarization of groups. People who were once "fence-sitters" may move away from the middle and join more extreme groups at the opposite end of a spectrum, for example, a political spectrum.