National parochialism is widespread around the world https://www.mpg.de/17299130/national-parochialism
In our globalized world, cooperation between citizens of different countries should actually be a matter of course. But around the world, people prefer to cooperate with their own fellow citizens rather than with foreigners. This was the result of a study by an international team of researchers.
money and asked to decide how much of this they would keep and how much they would hand