"The research suggests that leadership qualities like taking charge and being competitive have an evolutionary advantage even if high socioeconomic status no longer does. "Perhaps the idea of having children is most attractive (or least frightening) to individuals who prefer to act as leaders and to influence other people, including their own offspring," the authors write. The theory is that evolution genetically predisposes Type A's to like having kids because thousands of years ago, people with Type A personalities accrued more resources to guarantee their kids' survival."

Perhaps...but Type A are also predisposed to having heart attacks. :~( Aren't Type A's mostly first-borns & onlys?

They sound bossy to me, oh crikey I hope I'm not one.

Perhaps it is the Type A's tendency to rush ahead, nose to the ground, seeing none of the waste and destruction that populating a dying planet entails.