right of return

The right of return for Palestinian refugees of 1948 are based on
* The Geneva Conventions of 1949
* UN General Assembly Resolution 194
* United Nations General Assembly Resolution 3236
* Article 12, International Covenant on Civil and Political Rights

In addition, there is the perspective of private property rights.
The claim that Arab leaders encouraged Palestinian Arabs to flee has been mostly disproved, especially by the New Historians, which instead have shown evidence indicating Arab leaders' will for the Palestinian Arab population to stay put.