Not to detract from the research itself, but it requires more involved reading. I personally found the first chapter most interesting of all, possibly because of my own research background in neuroendocrinology and brain development, and possibly because of the chapter's extensive referencing of the research of Michael Meaney, Ph.D., which I had followed during my graduate years. Meaney has spent the past couple of decades looking at how maternal behavior toward pups leads to long-lasting changes in those pups, mostly with regard to the HPA axis—the stress axis. The chapter goes on to describe more recent findings of Meaney's group that show how traits such as licking and grooming, which are known to decrease stress axis activation among adults, can be passed down from one generation to the next. This particular line of research is key to issues such as how abuse of one generation can lead to abuse of the next. For readers who have not been exposed to this research, this chapter gives an excellent introduction, as well as an introduction to other areas of research in this burgeoning area of transmission of traits from one generation to the next.