It's not philosophy, it's cold hard fact. There are only two reasons that its acknowledgement is resisted.
1. There's an incentive to do so by people who profit off of fear mongering.
AND
2. A complete lack of understanding of the current state of violence in all forms when compared to the history of violence (largely exacerbated by #1).
People tend to perceive things that they're personally subjected to, or witness, as more significant than other more distant accounts of similar events that affect only third persons. Violence is down but exposure to the remnant violence is up. Its pumped into every aspect of our lives 24hrs a day through the internet/media. It creates the perception that violence is rampant when in reality, relative to history, it is strongly down. Nobody seems to remember that it used to be a regularity for the entire township in 'developed' and 'modern' nations to show up to the square to witness a heretic being tortured to death through any number of creative means that could fill a book. And that was a spectacle...entertainment.
WWII had a higher gross death toll than any other conflict in recorded human history, but when looked at as a percentage of the human population, it barely breaks the top 10 worst conflicts. Even so, it is an outlier in a strong downtrend in the data. There are historical conflicts in which nearly 10% of the existing human population was killed. If that happened today you're looking at 700million deaths. Now the 5000 U.S. deaths from Iraq and Afghanistan are almost too much for the American public to stomach. 5000 makes up .001% of the U.S. population, or .00007% of the world population (Yes, I'm aware that there is another half to the conflicts to consider...the point remains valid).
Violence through warfare, both civil and international, has declined sharply in both frequency and intensity. Homicide rates, instances of rape, hate crimes, spousal and child abuse, and non-violent crimes of nearly all types are in long term decline. Genocide, state sponsored and non-state sponsored torture, even things like state sponsored executions ('justified' or otherwise), institutional discrimination, slavery, and sexual exploitation are on their way down. And yes, I know it's hard to believe if you watch cable news networks, but terrorism is sharply down as well.
We live in the most tranquil time in all of human history. Anybody who claims to be an expert in violence and then makes the comment that "we may well be in the most violent times in history" is either knowingly peddling in bullshit for personal gain, or is grossly misinformed. Period.
Edit: BB Stacker beat me to it.