Firstborns are more intelligent than their younger siblings—at least that's what science tells us. But why birth order matters goes deeper than just getting the best batch of genes from the parental pool. If siblings basically contain the same genetic makeup, how are firstborns different from their younger counterparts? The reasons why those first in line are graced with a higher IQ comes from a cocktail of environmental and biological factors that differ from family to family. How smart its members are depends on everything from early intellectual stimulation to limited parental resources.
While the eldest typically ends up earning higher wages and better education than the rest of the family, being the oldest sibling also comes with a few downsides. Older children are likely to be punished more strictly than their younger siblings. The oldest is also often more of a people-pleaser. These facts about eldest children are pretty surprising—unless of course you're the genius oldest child, then you probably already know all of this.
Limited Family Resources Intellectually Deprive Younger Siblings
Firstborn Children Are More Likely To Pursue Higher Education
Firstborns Show More Intelligence Starting From A Year Old
Firstborn Children Learn To Speak Like Adults
Firstborns Receive More Attention From Their Parents
Firstborn Children Are More Ambitious Than Their Younger Siblings