Why do you think the song "Ohio" by Crosby, Stills, Nash, and Young was in the Rolling Stones top 500?

The song "Ohio" was written by Neil Young in 1960 after the Kent State shooting durring a student protest that ended in 4 students being killed and 9 injured, he very bravely calls out the president "Nixon" and speaks for a majority of the nation at that time about the Vietnam War.