Birth Order

Two recent posts (at Tom‘s and Sean‘s blogs) describe birth order. For both environmental and biological reasons, older siblings tend to be more intelligent, and are more likely to be heterosexual, than younger siblings. Tom describes how the former can be to the advantage of younger children: less able to coast on life experience and visual-verbal reasoning ability, they are more likely to concentrate on social interaction. Likewise, it is easy to argue that homosexuality (which Sean discusses in passing) may be to a group’s advantage, as it allows a nonreproducing worker/warrior population to serve the reproductive interest of the rest.

Hmm…