The Founding of Rome
Rome began as a cluster of villages on hills above a ford in the Tiber — a defensible spot on a trade route, which is most of why it mattered. Romans later told themselves a founding story of twins raised by a wolf and a murder between brothers, and another about taking wives by force from a neighboring people. What actually distinguished early Rome was less romantic and more consequential: an unusual willingness to absorb outsiders, extending citizenship to conquered peoples rather than merely ruling them, which let a small city grow without running out of Romans.
A durable new order — a state, an institution, a system of rule — is deliberately built and consolidated, outlasting the people who founded it.