I recently read an article in Medical News Today where it is suggested that birth order affects the way a family sees and treats kids, which in turn affects the development of their personality. I am the 9th of nine kids and after seeing some of the characteristics of the youngest child it seems to describe me. I also talked to my oldest sibling and middle sibling and characteristics related to their birth order seem to align. However, after some googling it appears there is no scientific evidence to support a birth order theory. Just tossing this out for discussion.