Violence in Society, There Seems to Be a Need for It

It gained through violent behavior is only temporary and it lasts until the time of revenge comes around.
Violence was glorified hundreds of years ago. Back then it was a form of a pure entertainment. We know how among ancient Romans, gladiators (usually slaves or captives trained for the purpose),fought with swords or other weapons at public 'shows'. The more harm the gladiators inflicted the bigger hero he was, and the more respect he gained. All the crimes they committed were condoned, accepted and glorified.
Today it seems like instead of gladiators we have boxers. Is boxing just a sport, or another way of violent behavior, that is not only accepted by society but also in many ways glorified? Do we glorify boxing (most of the time bloody shows) because it is entertaining, or maybe because it is a multi-milion dollar business? …