The massive lowering of the bar of “good enough to stay alive”. Life expectancy was consistantly in the 30s up until the 1870s. Simply having kids was life threatening… doing so while malnourished even more so.
Natural selection favors traits that increase the odds of having offspring, as well as those that avoid death before having offspring. Avoiding death is a lot easier than it used to be.
The massive lowering of the bar of “good enough to stay alive”. Life expectancy was consistantly in the 30s up until the 1870s. Simply having kids was life threatening… doing so while malnourished even more so.
Natural selection favors traits that increase the odds of having offspring, as well as those that avoid death before having offspring. Avoiding death is a lot easier than it used to be.