Chapter 15 focuses on mental illness and how it has been seen in the past and present. It also focuses on the different types of mental illness and how they differ/are the same. I was really interested in how the different disorders/syndromes are defined and the criteria for their diagnosis. The fact that there are different syndromes in different cultures, but that many of them overlap cultures tends to make me think that mental disorders are all at least somewhat universal. I personally found this chapter fascinating because my family has a long history of mental illness.