were only temporary leases, often the Magnates never returned them. This gave rise in the 16th century, to a self-policing trend by the szlachta, known as the ruch egzekucji praw — movement for the enforcement of the law – against usurping Magnates to force them to return leased lands back to their rightful owner, the monarch. One of the most important victories of the Magnates was the late 16th century right to create Ordynacjas, similar to Fee tails under English law, which ensured that a family which gained landed wealth could more easily preserve it. The Ordynacjas that belonged to families such as the Radziwiłł, Zamoyski, Potocki or Lubomirskis often rivalled the estates of the king and were important power bases for them. The difference between the magnateria and the rest of the szlachta was primarily one of wealth and life-style, as both belonged to the same legally defined class being members of the same clans. Consequently, any power wrested from the king by the magnates was consequently trickled down to the entirety of the szlachta. This often meant the rest of the szlachta tended to cooperate with the magnates rather than struggle against them. Szlachta loss of influence The notion of the szlachta's accrued sovereignty ended in 1795 with the final Partitions of Poland, and until 1918 their legal status was dependent on the policies of the Russian Empire, the Kingdom of Prussia or the Habsburg monarchy. In the 1840s Nicholas I reduced 64,000 of lesser szlachta to a particular commoner status known as odnodvortsy (literally "single-householders"). Despite this, 62.8% of all Russia's nobles were Polish szlachta in 1858 and still 46.1% in 1897. Serfdom was abolished in Russian Poland on February 19, 1864. It was deliberately enacted with the aim of ruining the szlachta. Only in the Russian Partition did peasants pay the market price for land redemption, the average for the rest of the Russian Empire was 34% above the market rates. All land taken from Polish peasants since 1846 was to be returned to them without redemption payments. The ex-serfs could only sell land to other peasants, not szlachta. 90% of the ex-serfs in the empire who actually gained land after 1861 lived in the 8 western provinces. Along with Romania, Polish landless or domestic serfs were the only ones to be given land after serfdom was abolished. All this was to punish the szlachta's role