Home > Work > Selfish Reasons to Have More Kids: Why Being a Great Parent is Less Work and More Fun Than You Think

Selfish Reasons to Have More Kids: Why Being a Great Parent is Less Work and More Fun Than You Think QUOTES

1 " In 1984, Science published a study of almost 15,000 Danish adoptees age fifteen or older, their adoptive parents, and their birth parents. Thanks to Denmark’s careful record keeping, the researchers knew whether any of the people in their study had criminal convictions. Since few female adoptees had legal problems, the study focused on males—with striking results. As long as the adoptee’s biological parents were law abiding, their adoptive parents made little difference: 13.5 percent of adoptees with law-abiding biological and adoptive parents got convicted of something, versus 14.7 percent with law-abiding biological parents and criminal adoptive parents. If the adoptee’s biological parents were criminal, however, upbringing mattered: 20 percent of adoptees with law-breaking biological and law-abiding adoptive parents got convicted, versus 24.5 percent with law-breaking biological and adoptive parents. Criminal environments do bring out criminal tendencies. Still, as long as the biological parents were law abiding, family environment made little difference. In 2002, a study of antisocial behavior in almost 7,000 Virginian twins born since 1918 found a small nurture effect for adult males and no nurture effect for adult females. The same year, a major review of fifty-one twin and adoption studies reported small nurture effects for antisocial attitudes and behavior. For outright criminality, however, heredity was the sole cause of family resemblance. "

Bryan Caplan , Selfish Reasons to Have More Kids: Why Being a Great Parent is Less Work and More Fun Than You Think