What is the theme in Bartleby the Scrivener, A Tale of Wall Street by Herman Melville?

One major theme in Bartleby the Scrivener is that of isolation. In the story, we see Bartleby's difficulties and challenges in terms of making a connection with other. He is isolated at work by walls and screens, he isolates himself socially, and he even gives up leaving his workplace. Note, Bartleby's isolation is also self-imposed. He doesn't reach out, and he doesn't accept an offered hand.