What contribution did the Persians make to the world cultural development?

The Persians contributed to religion: Zoroastrianism introduced concepts such as good and evil. They also made a contribution to medicine: they performed complex operations, for example, a cesarean section, an operation on the skull. They were the first to create Sanskrit, which is the basis of modern languages. Darius 1 compiled the first set of human rights, invented the tax system. The Persians invented the wheel, wrestling became a sport also thanks to them. The invention of the monetary system and postage belongs to the Persians.