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Sibling Science
I found your cover story on birth order fascinating [Nov. 12]. For years, I have attempted to interpret myriad human actions through the filter of birth order. Although I understand a theory is far from a catchall answer to psychological mysteries, I believe this one explains a large part of our behavior. Thank you for publishing the latest research.
Kathryn Bridges Pulliam,
Mobile, Alabama

I have three sons, so I read your article on birth order with interest. Example after example that you supplied showed...

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