In the instances you see that, it's just history repeating itself, on a smallers scale op. Its actually gotten miraculously miraculously less violent.
Look at any historical stretch of time in any place in the world, the harrowing ways people used to live in poverty. The poorest people from today, would have been considered rich well into the turn of the century. Even after the first and second industrial revoltion.. The vast majority of people lived on $2 per day through most of human history.
People used to be absolutely shameless in their violence and petpetual war. Kingdoms, even tribes almost never stopped fighting and slaughtering each other. If you ever really studied history you would know a "modern empathy crisis" sounds laughable..