In this excerpt from kennedy's 1963 civil rights address what idea is being most clearly defined?

"this is not a sectional issue. difficulties over segregation and discrimination exist in every city, in every state of the union, producing in many cities a rising tide of discontent that threatens the public safety. nor is this a partisan issue. in a time of domestic crisis men of good will and generosity should be able to unite regardless of party or politics."

diversity
equality
ethnicity
society