If the agreement was brokered by outside nations, a one-state solution under which Israel was forced to accept Palestinian refugees back could work and not violate the Palestinian right of return. The assumed problem this argument has with a one state solution is that Israel would not allow Palestinian refugees back to their homeland. However, this problem could be easily avoided. If an outside force such as the UN, US, or other nations were to ensure that the treaty was upheld, rights could be given to Palestinian refugees during the establishment of a single state. Israel could not break this rule without facing international backlash. A two state solution has been tried in the past and has failed; a one state solution could be done in a way that ensures Israel does not violate Palestinian right of return.