 Similarly prosocials are more concerned about the environmental consequences of, for example, taking the car or public transport.Research on the development of social value orientations suggest an influence of factors like family history (prosocials have more sibling sisters), age (older people are more prosocial), culture (more individualists in Western cultures), gender (more women are prosocial), even university course (economics students are less prosocial).However, until we know more about the psychological mechanisms underlying these social value orientations we lack a good basis for interventions.