Amazon.com (ISBN 0679442324, Hardcover)

This groundbreaking book takes on the influence of birth order in personalities and offers some surprising conclusions. Frank J. Sulloway, a researcher at the Massachusetts Institute of Technology, has undertaken the first comprehensive study of birth order in determining personality and social outlook. He produces overwhelming evidence that, because of the evolutionary hierarchy in families, first-born children are more likely to be conformists while the later-borns tend to be more creative and more likely to reject the status quo. He documents just how different siblings are from each another--a person tends to have more in common with any randomly chosen person of their own age than with a sibling--and explains why sibling differences occur. The book offers new insights into the determining factors of who we are and who our children will be, and it is unlike any research yet published.