The Internal Settlement would not have ended the Bush War, and unless they are willing to abandon the policy of one man one vote for African nations, Mugabe is going to be the man in charge. Unless you have to remove Mugabe from the equation somehow, he's gonna be running the show.
abandon the policy of one man one vote for African nations? you mean like Mugabe did? from 1980 till 1990 there were 20 "white roll" seats in Zimbabwe's parliament, the same number as in Zimbabwe Rhodesia's Internal Settlement.