Change Gonna Come

Students at Rhodes University held a protest following their graduation last Saturday calling for academic transformation. Many of the students protesting had graduated just hours before and interrupted a garden party celebration held on the campus to draw attention to inequality at the university. Read the full story here: www.thejournali...
As the old Sam Cooke song says;
"It's been a long, a long time coming
But I know a change gonna come, oh yes it will ..."

[@AfricanGirl1993]

Hallo, please could you tell me the name of the song and it's meaning?