This paper intends to show, based on two cases -one taken from past history and another from recent history, both examples of racial and sex segregation-, how theoretical advances and academic efforts that have been made to overcome and, if possible, eliminate those evils from sociocultural world, are still far from being real. This is evidenced by most daily news showing events of exclusion and repudiation of the other, behavior visible both in civilized world and in countries in which moral and material progress still advance with shy steps. This exercise, and the analysis of the presented cases, want to show how the problem of racial and sex segregation is expressed. For sustaining those reviews, revisions of central concepts of analysis, the other, exclusion and gender, were made.