In a segment of chapter 14th. It is talk about the how birth order play in our personalities. Two researches were given allusion in the segment. The first one is form the book: The New Birth Order (Leman, 1998) where the following conclusions are found:
Firstborns tend toward achievement
The second research conducted by Frank Sulloway, analyzed famous scientist in history and by compering their birth other and the radically of the ideas found the following results:
Firstborns usually supported the status quo.
favor revolutionary ideas; for extremely radical ideas,
this ratio increased to 4.7.
You should also acknowledge that, both of these researches are being question in regard the validity of the results. This so general result create the possibility of doing so general assumptions as the one of the following five question test (Check it out!) that presumes finding your birth order.
From my experience, I'm the last-born and I'm a bigger risk taker and radical idea promoter than my two older siblings. I think that these similarities can be found, because parents treat each kid different. Which explanation is that the parents are different since their experience, age, energy, etc has change.
Do these theories apply to YOU?