The idea of the Renaissance spread from Italy to the North European countries. Factors such as expanded trade, the growth and development of European cities, the invention of the printing press, the rising rich class who wanted to support art, contributed to this. Many kings experienced artistic achievements as a source of national pride. Also, artists fled the war in Italy in the late 1400's. The Catholic Church's lack of interest in participating in the real life of people played a major role, simply did not want the change.
Still, the main factor was trade and technological innovation that go together.
The invention of the printing press is the dominant factor. Around 1450. Johannes Gutenberg invented mobile printing press.
Thomas Jefferson. Now I just have to make this "at least 20 characters to explain it well". I'm not entirely sure how to explain Thomas Jefferson more though.
Initially, British and French commanders had believed that German forces would attack through central Belgium as they had in World War I, and rushed forces to the Franco-Belgian border to meet the German attack.