Messianism is any field of philosophy which concerns itself with the interpretations of stories about a world hero or the establishment of a Utopian world. The four most common topics of messianism are the Messiah, the Saoshyant, the Maitreya, and the Kalki found in Christianity, Judaic adventism/Zionism and Islam, Zoroastrianism, Buddhism, and Hinduism respectively, though Marxism and many other fields also present messianisms.