The Fertility Trap: How Modern Life Became Evolution's Greatest Selection Event
The Real Reason Why Humans Stopped Evolving Industrial civilization may be selecting itself out of existence through the most powerful evolutionary force in human history—differential reproduction at unprecedented scale On a spring morning in Lancaster County, Pennsylvania, Sarah Stoltzfus watches her eight children board the horse-drawn buggy for school. Fifteen miles away, Dr. Emily Chen, a Johns Hopkins neurosurgeon, deliberates whether to freeze her eggs before turning 38. She has no children and isn't sure she wants any. These two women, living in the same century on the same continent, inhabit completely different evolutionary universes. Over the next four generations—roughly a century—Sarah's demographic descendants will likely outnumber Emily's by a factor of 16 to 1, assuming each follows the average fertility pattern of their respective communities. This isn't a story about religion or culture wars. It's about mathematics, evolutionary biology, and a...