[The Conversation Africa] Kenneth Kaunda, the former president of Zambia, who has died in hospital in the capital, Lusaka, at the age of 97, was the last of the giants of 20th century African nationalism. He was also one of the few to depart with his reputation still intact. But perhaps more than any of his contemporaries, the standing of the man who ruled over Zambia for 27 years is clouded with ambiguity.