By 1978, William Julius Wilson (1935–) argued that race and racial classification systems were declining in significance, and that instead, social class more accurately described what sociologists had earlier understood as race.
Duk warsa 1978, William Julius Wilson (1935–) mapenampen indik ras miwah sistem anggen nyorohang ras puniki sayan ngareredan, taler tukalikannyane, soroh sosial sayan tinglis nlantarang indik napi sane durung karesepang olih sosiolog pinaka ras.