What is the major theme of A little cloud?

Joyce contrasts two worlds in this story, the world of domestic, insular and paralysed Dublin and the world of fast-moving, energetic and cosmopolitan London and Europe. Little Chandler desires to belong to the wider, modern world, and begins to despise his life with his family in Dublin. By juxtaposing Little Chandler with the successful, exuberant Gallaher, Joyce has set up an antithesis between the two worlds which they represent.