Former President Barack Obama liked to quote the Rev. Martin Luther King Jr.’s line that “the arc of the moral universe is long, but it bends toward justice.” Of course, what was an expression of optimism for the moral reformer King was more in the nature of a victory spike of the football for a competitor in a zero-sum electoral contest like Obama. 

More importantly, the belief that things are moving toward justice comes more naturally to believers in American exceptionalism, of which Obama isn’t one. He famously said that he believed in America’s exceptionalism only as much as “Brits” believe in British exceptionalism or Greeks believe in Greek exceptionalism.