Reviewed by: Collective Biologies: Healing Social Ills through Sexual Health Research in Mexico by Emily A. Wentzell William Sorensen Collective Biologies: Healing Social Ills through Sexual Health Research in Mexico. By Emily A. Wentzell. Durham: Duke University Press, 2021, p. 221, $25.95. In chapter one of Collective Biologies, there was a dramatic situation which riveted the reader's attention: a Mexican man was carjacked and kidnapped by narcotraficantes. He escaped; he was later interviewed by Wentzell. This was a compelling opening to more cerebral and repetitious writing throughout the rest of the book. Yet perhaps we need this repetition, for the subject matter is complex. Wentzell is an American anthropologist who recruited men already enrolled in a biomedical human papillomavirus (HPV) cohort study. The original study began in 2005 in Cuernavaca, whereby 3,000 men were tested for HPV every 6 months. While the testing component was in process, Wentzell stepped in to interview 84 participants, including the spouses of some of the men. Most of the couples were interviewed together. Her goal was to describe how being connected to a medical study would aid the biological and social wellbeing of others with whom they were related. On a broader level, Wentzell questioned the U.S. medical paradigm, which values individualism. There is good justification for doing these interviews: HPV is very prevalent (globally), can be deadly (certain strains develop into cancer), and men tend not to talk about their behavior or medical history. What they had to reveal is the subject for this book: Middle-class voices in a richly varied society, a society that includes poor Indigenes and wealthy elites, from narco-gangs to corrupt government agencies. But these participants are in the middle and perceive themselves as the vanguard of a future Mexico. Her conclusion is that these participants think of themselves as entities beyond mere individuals, as larger composites, yet biological in nature. These composites have different layers. The first level highlights "companionate" marriage or relationships (mutual, intimate, communicative, and respectful). Then comes the family unit. Then the citizen in a larger social unit, embracing mestizaje, which navigates away from European or indigenous identities. These subjects unfold as chapters 3, 4 and 5, respectively. Not only do these participants think and act this way, in larger composites; they also aid the biological and social wellbeing of others across the various levels. Wentzell's skill in describing these biological abstractions is impressive. She has the capacity to weave complex subjects together: class differences, Mexican gender norms, national stereotypes, history, the economy, [End Page 461] racial stereotypes, sexual disease transmission, familial and educational concerns, perceptions of governmental function, and more. She may improve her book by looking deeper into an examination of study bias. She is convincing up to a point, then seems to miss describing a possible Hawthorne effect from her study. Also, there is not sufficient acknowledgement of volunteer bias. Wentzell never comes full circle at the end the book by looking back at her preface. In the preface she brings up Covid-19 and mask-wearing behavior in Iowa; there would be interesting parallels with HPV and Covid-19 if discussed. To her credit, she nails down the complexity of HPV infection and that misunderstandings about HPV spread will inevitably arise–there is a large latency time to deal with, or unclear pathways of transmission. Still, 75% of the couples blamed men as the major transmitters of HPV. There is much harm in this outcome. Consequently, Wentzell develops a model of collective biologies based largely on people's misunderstanding. She acknowledges these points, sure, but more effort should be made to emphasize limitations of scientific knowledge of HPV transmission, and that model-making cannot possibly be finished (we see this same problem with Covid-19). Lastly, there are other theories that may explain why men, or women for that matter, psychologically change over time, and in the direction of "more companionate" humanity. For example, the theories of Erikson or Levinson's adult stage development in men can explain Wentzell's male participant behaviors (that is, men become more expansive as they age, they think of others more, they empathize more, and they develop a...