The reforms of Lycurgus were written as a list of rules/laws called Great Rhetra, making it the world's first written constitution. In the following centuries, Sparta became a military superpower, and its system of rule was admired throughout the Greek world for its political stability. In particular, the concept of equality played an important role in Spartan society. The Spartans referred to themselves as "όμοιοι" ("Homoioi", "men of equal status"). It was also reflected in the Spartan public educational system, agoge, where all citizens irrespective of wealth or status had the same education. This was admired almost universally by contemporaries, from historians such as Herodotus and Xenophon to philosophers such as Plato and Aristotle. In addition, the Spartan women, unlike elsewhere, enjoyed "every kind of luxury and intemperance" including rights such as the right to inheritance, property ownership, and public education.