After God had worked face to face with the first humans, Adam and Eve (the dispensation of Innocence, Genesis 1:28—3:19), they sinned, and all mankind became a fallen race living on a cursed planet. Conditions changed, and all subsequent families on earth were to do good based on what they knew to be right (the dispensation of Conscience, Genesis 3:23—8:19). Mankind again failed to fulfill their responsibility. So God brought a worldwide Flood to wipe out all but eight people. In the next dispensation, God works in a new way with His creation via Human Government.
Human Government is the third dispensation (Genesis 8:20 to 11:9).
Stewards: Noah and his descendants
The Period: From the Flood to the confusion of tongues at Babel, about 429 years
Responsibility: To scatter and multiply (Genesis 9)
Failure: Refusal to scatter