A case could also be made for other rights, such as the right to education—years of schooling and highest grade reached differ substantially between poorer and richer segments of the population—or freedom of expression and assembly, which the dispossessed feel unable to exercise for material or psychological reasons. If inequality is an obstacle to the enjoyment of human rights, an equitable distribution of wealth becomes a decisive variable for the overall system of protection of human rights, as well as for the advantages stemming from development. Important among such effects is the increasing vulnerability of people resulting from large-scale development projects.