Look at this. There were 18M unnatural deaths in the 18th century and this is a low figure relative to total population, compared to the 19th and the 20th centuries. However, it does not mean the 18th century was more peaceful since natural death occurred so much earlier in those days.
There are people dedicating their lives to gathering this kind of statistical data and interpreting it. I am fascinated; this is one of the things I would like.