A summit of sub-Saharan African leaders who met in Harare on Monday could not break the impasse in that country's political negotiations. If not exactly an example of quiet diplomacy, the summit did not either take the form of carrying a big stick with which to prod President Robert Mugabe to concede on some of the sticking points that almost certainly derive from his intransigence. As a general rule, any time that status quo ante prevails in Zimbabwe, Robert Mugabe wins.