What were the impacts of new and improved roads?​

Why did river valleys most farming impact the lives of neolithic peoples?

(05.04 mc) how did the roman transportation system keep the empire strong? plz

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