Are old wounds being reopened in a divided America?

From a bruising presidential battle to bloody mayhem on the streets, America seems to be reliving the conflict of 1968, and it’s time once more to challenge injustices, writes Maurice Isserman    

According to the Chinese zodiac, 1968 and 2016 are both the Year of the Monkey. But maybe we should call this the Year of the Ghost Monkey of 19

From the US presidential primaries to the convention platform battles to bloody mayhem in the streets, 1968 is the go-to, default metaphor for what we seem to be reliving.