Bob Marley stated that his two biggest influences were the pan-Africanist activist Marcus Garvey and King Haile Selassie of Ethiopia.
But Professor Haile thinks the analogy is over-simplistic.
The current record-holder, Haile Gebrselassie of Ethiopia, reckons it will take at least 20 years before the barrier is broken.
Visit the palace and final resting-place of Ethiopia's last emperor, Haile Selassie, then head north to Lalibela (a two-day bus journey), to see its ancient churches carved into solid rock.
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