Summary of the book Written by Daniel Nettle (2007), the book What Makes You the Way You Are is a captivating masterpiece that reveals how people have different traits, which determine their personalities. For instance, some individuals are nomads, while others are fighters. Why does the world comprise people who constantly look for wars while some are so easy going? Daniel Nettle (2007) argues that this situation can be explained by different personalities that different people possess. He explains his point of view by taking his readers through a tour of various theoretical approaches to human personality as postulated by science. He reveals that people’s personalities incept from their biological makeup. Also, the author explores different findings in genetic influences on personality, together with the findings realized in the field of brain science. He also discusses evolutionary approaches to human personality together with the repercussions of approaching human personality from this dimension. The core of the book is structured to address five main issues that Nettle (2007) believes have an impact on the personalities of people. These are sincerity, extraversion, reliability, amicability, and neuroticism. Nettle (2007) agrees that personality may be influenced by genetic makeup. However, persons from the same family possess different personalities. Besides, the author poses the question on the best personality that people should enjoy. How can one change his or her personality? To him, this query involves “choosing the right pond, and being mindful of the dangers” (Nettle, 2007, p.275). His book leaves more questions than answers on what influences people’s personalities in their lives. Nettle (2007) accepts this position by concluding that life involves different niches, which are in pursuit of the personality that works best for an individual. Personal Book Opinion Upon reading Nettles’ (2007) book, one gets the impression that it is possible to determine how personalities are developed within an individual. This assertion is evidenced by the immense discussion offered by the author on how personality characteristics and behavioral traits evolve. If indeed evolutionary theory could help to explain why some people possess certain personality traits. It means that it could be possible to find persons who have similar personality traits in that they could have undergone similar processes of evolution through environmental training. Faced with this dilemma, I believe that Nettle (2007) does not answer satisfactorily the question of why different people possess different traits that define who they are. If genetics could explain the prevalence of given personality traits among a certain group of people, why is it then possible to encounter a family with some honest members while others are dishonest, yet they share a similar genetic makeup? Perhaps the closest that Nettle (2007) goes in responding to the above query is explaining how the environment influences people’s behaviors and how, in turn, the behavior influences people’s personality. He explains that the environment creates demands and changes that people must adopt through one generation to another. Surprisingly, the environment referred by Nettle (2007) encompasses people together with their personality traits. Therefore, the persona