Modernism was a search for meaning in a chaotic world. Think of writers like Woolf or Joyce trying to find a new way to represent a fractured reality. Postmodernism, which followed, asked a different question: What if there is no single, unifying meaning to find?

This shift is best understood through the idea of the 'grand narrative,' or 'metanarrative.' These are the sweeping, all-encompassing stories that cultures tell themselves to make sense of the world. Think of overarching belief systems like the Enlightenment's faith in reason and progress, the Christian story of salvation, or the Marxist belief in an inevitable workers' revolution. These narratives claim to offer a universal truth, a key to understanding all of history and human experience.

The French philosopher Jean-François Lyotard famously defined the postmodern condition as an "incredulity toward metanarratives." After two World Wars, the Holocaust, and the threat of nuclear annihilation, the grand narratives of progress and human rationality seemed not just naive, but dangerous. The promises of science and reason had led to unprecedented destruction. As a result, thinkers and artists grew deeply skeptical of any system that claimed to have all the answers. They began to question the very idea of objective, universal truth.

If you reject the big story, what's left? For postmodernists, the answer was 'mini-narratives' (petits récits). Instead of one universal truth, there are countless small, local, and personal truths. My experience is true for me, and your experience is true for you. Neither is more valid than the other; they are just different.

This marks a crucial turn from objectivity toward subjectivity. While Modernism explored the subjective inner worlds of characters, it often did so with a sense of loss, mourning the collapse of a shared external reality. Postmodernism, in contrast, often celebrates this plurality. It accepts that reality is fragmented and that truth is relative to one's perspective, culture, and language. There is no single, stable vantage point from which to see the world 'as it really is.'

This embrace of pluralism and subjective reality provides the 'why' behind the radical experimentation in postmodern literature. If there's no single truth to represent, then artists are free to play with form, blend genres, and challenge conventions. They can create stories that are self-contradictory, that draw attention to their own artificiality, and that offer multiple, equally valid interpretations.

The goal is no longer to create a perfect mirror of reality, but to explore the countless ways reality can be constructed through language and storytelling. This philosophical shift from a search for universal truth to an acceptance of many small truths is the engine that drives postmodern art and thought.