This case concerns the certification of a class of black steel workers who allege endemic racial discrimination at a South Carolina plant owned by Nucor Corporation and Nucor Steel Berkeley (collectively, “Nucor”). Plaintiffs-appellants (“the workers”) accuse Nucor of both discriminatory job promotion practices and a racially hostile work environment under Title VII of the Civil Rights Act of 1964 and 42 U.S.C. §1981. The district court originally denied class certification for both claims, and this Court reversed.