Superstition is the belief in supernatural causality—that one event causes another without any natural process linking the two events—such as astrology and religions, like omens, witchcraft, and prophecies, that contradict natural science.
The word superstition is generally used to refer to the religion not practiced by the majority of a given society regardless of whether the prevailing religion contains superstitions. It is also commonly applied to beliefs and practices surrounding luck, prophecy, and certain spiritual beings, particularly the belief that future events can be foretold by specific (apparently) unrelated prior events.
Opposition to superstition was first recorded in ancient Greece, where philosophers such as Protagoras and the Epicureans exhibited agnosticism or aversion to religion and myths, and Plato – especially his Allegory of the Cave – and Aristotle both present their work as parts of a search for truth.
In the classical era, the existence of gods was actively debated both among philosophers and theologians, and opposition to superstition arose consequently. The poem De rerum natura, written by the Roman poet and philosopher Lucretius further developed the opposition to superstition. Cicero’s work De natura deorum also had a great influence on the development of the modern concept of superstition as well as the word itself. Where Cicero distinguished superstitio and religio, Lucretius used only the term religio. Cicero, for whom superstitio meant “excessive fear of the gods” wrote that “superstitio, non religio, tollenda est ”, which means that only superstition, and not religion, should be abolished. The Roman Empire also made laws condemning those who excited excessive religious fear in others.