Problem: Identify the four primary types of inter-group relations and how they impact different racial and ethnic groups. Place in chronological order the events that lead to the formation of Black ghettos in the first part of the twentieth century. Start by choosing the first item in the sequence and clicking, dragging, or using your keyboard to select it. The social boundary between Blacks and Whites hardened. "Urban renewal" projects forced Blacks to relocate into crime-ridden public housing projects. Federal aid to home purchasers favored Whites over Blacks. Demographic trends and structural changes in the economy increased competition for jobs. Property owners and police cooperated to maintain segregated neighborhoods. Need Assignment Help?