How many years between pre-history and the beginning of ancient history?

What is the main purpose of "falling action" in a story?

Article ii "each state retains its sovereignty, freedom, and independence, and every power, jurisdiction, and right, which is not by this confederation expressly delegated to the united states, in congress assembled."—articles of confederation which of the following principles of american democracy does this quote best represent? social contract natural rights federalism rule of law

What explains the political difference among african americans politicians during reconstruction