Gideon Rachman points out one problem with the International Criminal Court:
It will be much harder to persuade dictators to leave power, if they fear they may end up in the dock in the Hague. Some argue that Mr Mugabe might have agreed to go into exile, were it not for the sight of Charles Tayor - the former Liberian dictator - going on trial at the ICC. Taylor himself, it is argued, only quit office because he thought he had an amnesty. Mugabe and others like him will now never believe in amnesty offers - and so they will cling onto power regardless.