About 35 years. Genghis Khan created the Mongol empire in 1206. By the 1230s Batu Khan invaded Russian and Bulgarian lands. In 1241 at the battle of Mohi Batu Khan defeater a combined German, Polish and Hungarian army. Further expansion ceased do to the death of Ogedei Khan. Batu Khans attention was turned to succession instead of invading Western Europe.
The ideas of philosophers who were active during the Enlightenment period were that (2) faith in human reason was something they were ready to acknowledge.
This period itself was devoting a lot of thought and time into the idea of human rationalism, human advancement, science, and technology (all of these in their limited form at their time, as we're talking a few centuries in the past).
The philosophers that are considered to be from this period were Benjamin Franklin, Descartes, Diderot, etc.
