Effects of low-power light on biological systems V Book

Got where this book was going--the focus on avoidance of emotion in the 20th century, shift from Victorian style which focused more on sublimation (emotion has to be there in order to be sublimated, whereas avoidance means never having the emotion in the first place). Stearns' book is weaker on implications for "cool" in the second half of the 20th century. How does this kind of cool relate to the other kind(s)/meanings of "cool"? That's another book -- a valid historical question, though.