7 Surprising Ways Birth Order Affects Us

5 – First-born children were more conscientious, less sociable, and higher in leadership.

Another piece of research conducted looking at birth order and personality was conducted by Damian and Roberts (2015). This study looked at the effect of birth order on first and last born children’s personality. They found that in general, first born siblings were more conscientious, less socialable and higher in leadership skills. They are natural born leaders and achievers. They also tended to be more agreeable, and less neurotic, which would increase their leadership skills to.