Ive kept looking at this thread and couldnt make any decision , I was going to suggest an additional criteria could be -who "broke the mould" of political mindset-(so ,as often , I am agreeable with Pantagathus as regards Alexander). Churchill and Lincoln were great men in a tight corner but not as radical as Alexander or Napoleon , nor as GO suggests M Gorbachev.I still havent voted but make this suggestion as to narrowing the criteria , namely- was the geopolitical landscape changed radically by this person?. I would also say , a short term negative effect (Bonaparte) may be outweighed by a long term "evolution" of thought and mindset.So I ask, for example, did Mao Zhedung actually move China "forwards" geopolitically or is Sun Yat Sen a greater intellectual influence?