A rock album at 77, a global literacy legacy and no interest in winding down: what Dolly Parton taught us about making the second half of life count

Dolly Parton spent more than seven decades making herself impossible to overlook. There was the towering blonde hair, the rhinestones, the quick wit and the voice that could move effortlessly from playful to heartbreaking. Yet behind the larger-than-life imag…