Birth order and sibling competition

I got to read Frank J Sulloway work about siblings. Through his reading work, he argues that not all siblings have same attitude even they live together. Also he says that parents treat first born and younger born treat different. Since first born are more likely stronger than the younger born, parents takes and care more to younger ones. This totally came in to me because These really applies to me. For example I have one brother whos is two year younger than me. Even we came from same mother and father, and live together for more than twenty years his attitude and my attitute is really different. There are some similarites but not that much. For example his really quite in the house and outside of house, but I'm not. Also my parents worry and do care about my younger brother than me, because they think, I could handle myself and my younger brother still need their care. Also if I wanna add something that first born go through is that, if younger one does some things that they are not suppose to first bron get blame for that. Also for me, since I'm the first born I feel a lot of pressure because I have to take care of the family now.

Work Cited
Sulloway, Frank J. "Birth order and sibling competition".