what happens in states or countries with high rates of homicide? ... Have more babies, and have them earlier
It’s not just exposure to homicide that increases earlier pregnancies. Relative poverty, or income disparities—but not absolute poverty within a country—signals the evolutionary antennae for making babies earlier. There are some countries that have both violence and very large relative income disparities, and those are the areas or countries with the largest influx of people coming across the border.