For those interested in the topic, I can recommend Judith Rich Harris' superb book, The Nurture Assumption[1]. It mostly deals with debunking common views on p

For those interested in the topic, I can recommend Judith Rich Harris' superb book, The Nurture Assumption[1]. It mostly deals with debunking common views on parent->child effects, but includes some material on birth order effects. [1] https://jamesclear.com/book-summaries/nurture-assumption https://jamesclear.com/book-summaries/nurture-assumption