Some of the arguments used to support US expansion and manifest destiny were: European examples, new markets and access to vast natural resources. Because of the US massive industrial expansion and production, US industries needed new markets to sell their goods to and they need access to more natural resources to ensure the continued production. The US expanded its inluences into Alaska, the Pacific (Hawaii, Samoa, Guam, and the Philippines), Latin America and Asia (China and Japan)
Typhus is the answer i beleive
Postive effects could be that it brings people together, gives them a community for supporting each other, focuses their attention on God. It provides a moral framework, comfort for those in need, the promise of an afterlife... and so on.
Negative effects are that the different religions can be seen to inspire conflict in the world, some might say that they focus people too much on religious things rather than on day to day things (so you lose the plot basically!).
Mongol leader Genghis Khan (1162-1227) rose from humble beginnings to establish the largest land empire in history. After uniting the nomadic tribes of the Mongolian plateau, he conquered huge chunks of central Asia and China. ... Genghis Khan died in 1227 during a military campaign against the Chinese kingdom of Xi Xia.
Unifying the Mongols was no small achievement — it meant bringing together a whole series of disparate tribes. Economically the tribal unit was optimal for a pastoral-nomadic group, but Chinggis brought all the tribes together into one confederation, with all its loyalty placed in himself.
Hope this helps !
Have a great day! :)