Sense of Obligation is a science fiction short story by Harry Harrison, first published in 1967. The story is set in a future society where individuals are assigned jobs and roles based on their genetic makeup and abilities. The main character, Jeff, is a talented musician who is assigned to work as a garbage collector because his genetic profile shows a low aptitude for intellectual pursuits. Jeff is unhappy with his assigned role and struggles to find meaning and fulfillment in his life. As Jeff begins to question the society's rigid system of categorization, he meets a woman named Karen who is also dissatisfied with her assigned role. Together, they form a rebellion and try to overthrow the ruling class and the system that has restricted their freedom and potential. The story is a commentary on the dangers of a society that categorizes individuals based on their genetic makeup and abilities. It explores themes such as the nature of freedom and individuality, the importance of following one's passions and desires, and the consequences of blind obedience to authority. Ultimately, "Sense of Obligation" is a cautionary tale about the dangers of allowing society to dictate one's fate and the importance of fighting for personal freedom and self-determination.