Unlike the Tutsi caste system or the Bunyoro royal clan political monopoly, Buganda's kingship was made a kind of state lottery in which all clans could participate. Each new king was identified with the clan of his mother, rather than that of his father. All clans readily provided wives to the ruling kabaka, who had eligible sons by most of them. When the ruler died, his successor was chosen by clan elders from among the eligible princes, each of whom belonged to the clan of his mother. In this way, the throne was never the property of a single clan for more than one reign. Bunyoro's power began to ebb in the 18th century, with the separation of the Toro kingdom and more importantly the rise of Buganda.