After Kublai Khan's (Successor of Genghis Khan and ruler of the Mongol Empire for over 30 years.) eventual demise in February 18, 1294, the Mongol Empire shattered into pieces. None of his successors were suited for the job that meant to rule the Mongol Empire, being unable to reach the stature their predecessor left for them. From 1300 and the years that went on, disputes over who would succeed the late Kublai Khan weakened the central government in China, causing frequent rebellion that would damage the Yuan Dynasty even more, eventually making it fall down to be nothing in 1368. The two main reasons being the class conflict caused by the heavy taxation, the other being the ethnic contradiction resulting from the 'Four Class System'.