Social cohesion involves the inclusion of citizens and groups across the entire distribution of living standards - all need to share understanding of, responsibility towards, and a sense of belonging to their society. What, then, are the different social cohesion challenges facing each part of the income distribution? First, it considers disadvantaged groups in a different light: in countries where growth has lifted large numbers of people out of extreme poverty as defined by common international standards, many still remain disadvantaged by socially relevant standards, such as relative poverty lines.