Aliyah is the immigration of Jews from the diaspora to, historically, the geographical Land of Israel or the Palestine region, where in the 20th century the State of Israel was established. Traditionally described as "the act of going up", moving to the Land of Israel or "making aliyah" is one of the most basic tenets of Zionism. The opposite action – emigration by Jews from the Land of Israel – is referred to in the Hebrew language as yerida. The Law of Return that was passed by the Israeli parliament in 1950 gives all diaspora Jews, as well as their children and grandchildren, the right to relocate to Israel and acquire Israeli citizenship on the basis of connecting to their Jewish identity.