The Sacco-Vanzetti case exposed the divisions in American Society between

answer i think is this one Immigrants and Blacks.

By the 1920's, over 1000 companies a year vanished through merger. Corporate giants-Ford, GM, Chrysler, GE, Westinghouse

By 1930, one hundred corporations controlled nearly half the nation's business

Companies that made the same product often cooperated through trade associations on pricing, product specifications, and division of markets without merging