Serialism is a method of composition in music that organizes pitches, rhythms, and dynamics in a specific sequence or series. This technique was developed in the early 20th century, primarily by composers like Arnold Schoenberg. Instead of relying on traditional scales or harmonies, serialism uses a predetermined order of notes, which can create a unique and often complex sound. In serialism, each element of music can be serialized, meaning that composers can apply the same systematic approach to rhythm and dynamics as they do to pitch. This method allows for greater exploration of musical ideas and has influenced many contemporary composers, expanding the boundaries of classical music.