In "Work, Love, and Learning in Utopia: Equality Reimagined," psychological anthropologist Martin Schoenhals argues that the negative emotions of sadness, anger, and fear evolved in tandem with hierarchy, while happiness evolved separately and in connection to prosociality and compassion.
The book covers a range of human concerns, from economics and education, to media and communication, to gender and sexuality. Schoenhals argues that equality of love is as important and possible as is economic equality.