“소우주 (Mikrokosmos)” is the 3rd song on BTS' 2019 album Map of the Soul: Persona. The melodic song marvels at the endlessness every human individual possesses.

The title Mikrokosmos references the ancient Greek philosophy of microcosm, the perception of viewing humans as their own little world or mikros kosmos. Microcosm is used to observe humans in relation to the universe, and, at the time it was first studied, kosmos translated closely to the modern idea of order. In a broader sense, microcosm studies the harmonious relationship of each individual in parallel to everything else, which continues BTS' narrative of self discovery and persona.

The concept of “little universes” unique to each individual has been around since BTS' previous 2018 era for Love Yourself 結 ‘Answer.’