I'm finally getting around to reading Steven Pinker's The Better Angels of Our Nature. The descriptions of how widespread and commonplace violence was in the 'popular culture' of the medieval and middle ages make for fun reading, but I wonder (because I don't know) how representative said popular culture was of the larger societies it existed in at the time.
I bring this up because that doesn't appear to be the case today--if anything, the inverse seems to be true. Agnostic has indefatigably documented a whole host of things, including this, in a long-running analyses of cultural differences between rising (and high) crime eras and declining (and low) crime eras. Check out comic books from the low crime mid-20th century, for example. Video games, a sort of contemporary successor to comic books, have become far more graphically violent and intentionally realistic in their depictions of said violence (having previously opted for stylized depictions of violence and a predilection for surreality) over the last few decades as actual rates of violent crime have steadily dropped.
As real life in the West has become increasingly more peaceful over the last twenty years, football has clearly surpassed baseball as America's pass time and MMA has left boxing behind. In many ways, as we've become less violent, our popular culture has become more so. Moving outside the US, the exceptionally pacifistic Japanese are into some extremely gruesome and disgusting stuff.
More generally, Quentin Tarantino is a successful director and producer, but if aliens were to try and surmise what life on earth is like for its human inhabitants by viewing Kill Bill and Django Unchained, their conceptions would be wildly off base. Western popular culture is way more violent than life in the Occident actually is.