The two main factors that determined the character of spartan society were

the conquest of Messenia and the enslavement of the Helots

Explanation:

the antiquated Greek city-province of Sparta had a social order that was not the same as a large number of its neighbors. The highest point of the social pyramid was possessed by the two rulers, whose forces were checked by a 'board of older folks'. These older folks were browsed the following class, the Spartiates. Underneath this blue-blooded class was a working class which was known as the Perioeci. The most minimal class, which was likewise the biggest, in Spartan culture was held a gathering known as the Helots. As indicated by the Greek geographer Pausanias, the Helots hailed from a city called Helos. This city is said to have been vanquished by the Spartans, and its tenants turned into their first slaves.