So how did Roe v. Wade help trigger, a generation later, the greatest crime drop in recorded history? As far as crime is concerned, it turns out that not all children are born equal. Not even close. Decades of studies have shown that a child born into an adverse family environment is far more likely than other children to become a criminal. And the millions of women most likely to have an abortion in the wake of Roe v. Wade--poor, unmarried, and teenage mothers for whom illegal abortions had been too expensive or too hard to get--were often models of adversity. They were the very women whose children, if born, would have been much more likely than average to become criminals.