Final answer:
Jaggar claims that the neglect of emotion commenced with the Enlightenment, which favored rationality over emotional understanding in analyzing human behavior. Freud's psychosexual theory supports the significant role emotions play, indicating that unresolved emotional conflicts during developmental stages have long-term psychological effects.
Step-by-step explanation:
According to Jaggar, the neglect of emotion began with the Enlightenment. The Enlightenment emphasized rational thought, empirical evidence, and scientific method, which led to a devaluation of emotions in understanding human behavior and social structures. This neglect has been subject to critique, particularly within the fields of sociology and philosophy that argue for the importance of emotion in analyzing social phenomena and individual behavior.
Correspondingly, according to Freud, failure to properly engage in or disengage from a specific stage results in emotional and psychological consequences throughout adulthood. Freud proposed a psychosexual stage theory of human development, suggesting that unresolved conflicts in any of the stages would lead to fixation and impact psychological health later in life. This concept foregrounds the lasting importance of emotional experiences and their impact on the psyche.