Production of more food--the system allowed for more food to be produced which fed the workers in an industrial economy.
The 'four-field system' rotates crops between the 4 fields no longer needing to keep one empty because one of the crops would replenish the field with nutrients while the others take nutrients away from the fields. <span />
When King Menes united the kingdoms of Upper and Lower Egypt by establishing a succession of rulers from the same family, he founded the first Egyptian dynasty.
The answer is cedar my dude
William Lloyd Garrison, and Arthur Tappan.