Below are discussions on 'Is Paradise Lost?'.

It would have better served the purpose of Vertias forum if somebody with a higher level of scientific rigor and integrity replaced Dr. Christopher Ryan. Is the newest addition to a long line of pseudo-science sex writers the best that could be mustered to represent a 'differing worldview' on sexuality?
A review of his recent book (Sex at Dawn) in the journal of Evolutionary Psychology (www.epjournal.net – 2011. 9(3): 325-335) runs to eleven pages to point out just a fraction of the systematic biases in reporting of data and misrepresentation of challenged hypotheses as well-supported ideas. The review, quite unlike the book, is replete with references to primary literature, and thus open for further analysis.
It didn't take me more than two hours of research in primary literature to discover that the lack of integrity in the book isn't limited to findings of Anthropolgy. While authors have been obviously aware of the cell and molecular evolutionary studies on the subject, they chose to ignore all the works that strongly challenged their central claim and showed that cellular physiology and genetics imply humans as biologically monogamous (See for example Nature Genetics (2004) 36:1326 and Nature (2002) 416:496).