美国历史上大名鼎鼎的杰斐逊总统，到底和美国的民主制度有着什么样千丝万缕的联系呢？
Vincent van Gogh - Top 7 Real Facts
Who was Confucius
Top 7 Leonardo da Vinci Inventions
Top 10 Presidents of the USA
How the Republican Party went from Lincoln to Trump
Abraham Lincoln