Paying it forward - a popular expression for extending generosity to others after someone has been generous to you - is a heartwarming concept, but it is less common than repaying greed with greed, according to new research.
"The idea of paying it forward is this cascade of goodwill will turn into a utopia with everyone helping everyone," said lead researcher Kurt Gray.
"Unfortunately, greed or looking out for ourselves is more powerful than true acts of generosity."
The study is the first systematic investigation of paying forward generosity, equality or greed, according to the authors.
"The bulk of the scientific research on this concept has focused on good behaviour, and we wondered what would happen when you looked at the entire gamut of human behav-iours," said Dr Gray, an assistant professor of social psychology at the University of North Carolina-Chapel Hill, who conducted the study with researchers at Harvard University.