The other for many people are the places they grew up, people with similarities or similar interests, similar values, same race, and etc. People set these boundaries because they want to establish their own identity, how they are different from others, and what makes them feel superior over a certain crowd(s). The common population does this with the homeless population. In the passage, it states, "this is, in essence, the tension at the heart of bourgeois culture, and it was the singular genius of the Victorians to make it the main component of their medical, aesthetic, and moral systems.