It is simply not true that war is solely a means to an end, nor do people necessarily fight in order to obtain this objective or that. In fact, the opposite is true: people very often take up one objective or another precisely in order that they may fight.
People ache to believe that we human beings are vastly different from all other species - and they are right! We are different. We are the only species that has an extra medium of design preservation and design communication: culture.