How did civil rights activists advance the ideals of liberty equality and opportunity for african americans?

They organized boycotts, marches, sit-ins, and worked to change laws.

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

< 3