Moscow was quite stable and prosperous for many years and attracted a large number of refugees from across Russia. The Rurikids maintained large landholdings by practicing primogeniture, whereby all land was passed to the eldest sons, rather than dividing it up among all sons. By 1304, Yury of Moscow contested with Mikhail of Tver for the throne of the principality of Vladimir. Ivan I eventually defeated Tver to become the sole collector of taxes for the Mongol rulers, making Moscow the capital of Vladimir-Suzdal. By paying high tribute, Ivan won an important concession from the Khan.