A hormone, named Oxytocin, produced by the hypothalamus in the brain, which helps and has been shown to make people trust each other more and promote feelings of love.
But according to researchers, this hormone has now been found to have limits, since it promotes love and trust only towards know(in-group) people and not towards people who are seen as different.
Psychologists have therefore concluded it is involved in ethnocentrism.
Ethnocentrism is the tendency of people to see their own group as superior to other groups, which can lead to prejudice, intergroup violence, and xenophobia.
Psychologist Carsten K. W. De Dreu of the University of Amsterdam with his colleagues carried out this research.
The paper was published in the Proceedings of the National Academy of Sciences (PNAS) in the US.
Read More: [Studying Health]