Hawaiian culture is deeply caste oriented, with definitive roles for people based on their pre-ascribed social standing. This is also reflected in their land system, with moku, tracts of land given to people of high standing and is kept within the family, being split into smaller ahupua'a, which extend from the sea to the mountains, ensuring that each tract of land includes all necessary resources for survival, including hardwoods and food sources. The island of O'ahu is divided into seven moku, with the largest being 'Ewa and the smallest being Wahiawa. The ahupua'a is managed by managers, who are charged by the chief to collect tributes from each tract. Specialized splits of the ahupua'a are based on the level of tribute, with the major split being 'Ili. 'Ili give a small tribute to the chief (leader) of the ahupua'a and another to the chief of the island. This is a form of tax, as well as a condition of the caste oriented land system. This is very comparable to the European system of feudalism, since the usage of land for political control and social order is very similar.