What are two themes of the modern/post modern era?i need to know alittle about the themes also

I usually think about the modern and the postmodern as related but separate eras. Still, it's possible to see them as one era and to talk about some themes or concerns that they share. My comments focus entirely on literature, but it's possible to talk about other areas, too, such as architecture or the visual arts.

One possible theme is multiplicity. Rather then present the unified views of a small group of people, in a unified form, the modern and postmodern literary work often seeks to present a range of views in a range of forms. A 19th-century novel is often very nicely structured, and all of the plot lines are tied together and resolved before the work ends. Such a novel often opens with a clear setting, with names of characters, etc., before any dialogue begins. A modern or postmodern novel (e.g. Mumbo Jumbo) may often open in a jarring manner, may never answer the questions that it raises at the start, and may incoporate forms that don't normally belong in novels.

Another possible theme is interiority. The modern/postmodern didn't invent the idea of the inner self, of course, but modern and postmodern literature has taken interiority to a new level. Stream-of-consciousness is one example.