Steven Pinker states in The Blank Slate that birth order does not affect personality. However, most scientists do not agree.
It can be an interesting blend with hand reading when evaluating a man.
Dr. Kevin Lehman, in The New Birth Order Book: Why You Are the Way You Are
puts it all in a nutshell.
First-borns share most of the traits of an only child.
They are generally perfectionists, reliable, well-organized, critical, serious, loyal, conscientious, goal-oriented and self-reliant. They were once the center of their parents’ world and they’ll strive for most of their lives to retain or regain this position.
A large proportion of first-borns end up in high achievement professions such as architecture or law.
Sly Stallone was a first-born son. Many great, gifted, successful or notorious men were either first-born sons or only sons:
Beethoven, Shakespeare, Freud, Mao Tse-Tung, Hitler, Nietzsche, James Dean, John Lennon, Goethe, Bob Marley, Ted Bundy, Martin Luther King, Fidel Castro, Einstein, Galileo, Charles Dickens, Robespierre and 21 of the first 23 American astronauts to go into space. The list is endless.
Second-borns are generally mediators, independent, loyal to the peer group, likely to avoid conflict and often end up as rebels who go their own way.
They’ve survived the jealousy of a displaced older sibling. While they’re sometimes bullied by the first-born, they tend to hone their survival skills through this trial by fire.
Take a look at any two siblings, a first-born and his second-in-command, and you’re sure to find two very different personalities. It’s almost as though the second-born checks out the talents of his older sibling and aims for a different way to shine.
The youngest child is generally charming, a show-off, manipulative and precocious, the family clown, with a tendency to blame others if things go wrong.
Mom and dad were tired by the time this apple fell off the tree and they tended to spoil him and let his bad behavior slide. Discipline flies out the window with the last-born.
If you think about the life patterns attributable to birth order it becomes evident why