Under Kublai Khan the Mongol empire reached its largest extension. He ruled over 24000000 km² (nearly 10000000 mi²). The empire went from China and Korea to Iran and southern Russia, from the Korean peninsula to the Danube River.
During Kublai's reign the empire was divided into four smaller Kanatos but he still remained as the Great Khan of all of them. He was actually the first Khan to successfully conquest China in 1279, making him the first Yuan ruler of the whole China. After his death, the mongols didn't elect a new Khan and the Kanatos became more independent.
Engaged in the complex mental labours by which they crique shape and lead in the politics and culture of their society
Pretty much, the Communists were much stronger than the Nationalists. Their public support was strong due to promised land reform for peasants and their military organization was more experienced. The Nationalists had weak, public support and their military was ineffective, corrupt leadership and poor morale. They were an easy beat.
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The Catholic Church became corrupted, due to its overgrown power. Because of the Pope's overspendings, the Pope started the Sales of Indulgences. The Sales of Indulgences was a scheme to earn more money. It made people spend money so that they/family members go into heaven. This upsetted a reformer, Martin Luther. That started the Reformation. So in summery, the Catholic Church gained to much power ( more than the nobility) and it wanted more money. BTW, this only a little bit of it.