I am particularly grateful to Steven Pinker, a professor at Harvard, who is continually publishing material showing that homicide, murder and death from military action has been in a steady decline for centuries.
Our individual worlds have not only gotten safer from other humans. At the same time our world has gotten safer from our long-term enemies: the microbes.
This article that appeared in Slate makes the point that there are several long-term improvements in addition to Pinker's specialty of intra-human attacks. Good.
I would like to point out that in the past 200 years we have also conquered most microbes, many hereditary physical deformities and we have wiped out hunger and famine in 98% of the world.
While Pinker won't say it and neither will the rest of the Lefty world, all of these improvements in our lives are attributable to the rise of industrial commerce.
If we take a pro-commerce stance we will witness even more rapid improvements in the human condition, domestically and worldwide.