[narfforc]

You are probably right in saying that Denethor would have caused some problems had he lived, however if Boromir had lived and remained true, he would surely have seen Aragorn in a more positive manner, I even believe he would have bent his knee before the whole world and accepted Aragorn as his King. Denethors madness would have been his downfall, in the same way Hitler imploded. Mad men cannot think, their followers soon come to hate them, ruin and destruction are the battle honours of deranged leaders. In saying all this, I believe what you say to be true, for Politicians, Leaders and Councils of Leaders are corrupted by power and have only one true agenda, that is to hold on, clinging as hard as they can to power, at all costs, spending the lives of their followers until utter ruin.