If I’m remembering theory notation correctly, the change for “Inner City Blues” is i-IV. Two chords. It opens with twenty-four straight measures of the minor root before finally changing to the major IV, where it stays for all of four measures before returning to the root. Would have bored me senseless a decade ago; now, I’ll be damned if that change ain’t transcendent. The song is a chant-like, soul-filled lamentation. An angry prayer.