what are the main contributions to the health and happiness of the world that iran has made outside of its borders in the last 50 years?
Another commenter responded that Iran houses more refugees than any other country in the world. That is true. There are many Afghanis and Iraqis here. Someone from the UN told me that it is hard to count the number of Afghanis because they make every effort to disappear into Iranian society.
Going back a bit more than 50 years, we should not forget that Iranian diplomats were instrumental in saving many Jews during the Holocaust and that many Armenians found refuge in Iran as well when they were being killed by the Turks.
That's not too shabby, I would say...