A glass containing a certain quantity of water can be observed from many angles. Everyone could make a judgement on this phenomenon according to their own vision and understanding of things. We have chosen to look at it differently, and this vision is relative. Inspired by Julien Freund's work on the sociology of conflict, we have tried to look at conflict differently, not as a destructive phenomenon, but as a source of individual or societal progress. Indeed, this book opens with a demonstration of the inherence of conflict in society and, by extension, in man as a unit of society. Next, we look at some aspects of life in society that could be sources of conflict, according to the criteria for classifying types of conflict. Finally, we propose some tools for resolving conflict in society, and the consequences that may ensue.