Sumer is important in the world history because it was answer here

Sumer is important in the world history because it was considered the creators of civilization to modern humans. The name Sumer comes from Akkadian, the language of north Mesopotamia, which means “land of the civilized kings”.

Moreover, Sumer is known for their innovations in language, architecture and governance that resulted to an established order in the region and began the world civilization.

bibliography and citations to credit the sources hope this you if not my deepest of apologize ^w^

b) they want the land taken away from the wealthy landowners and given to peasants.