At the height of the Roman Empire, how far north did the empire stretch?

The people who came to the american colonies in the 17th century had already been exposed to the idea of limited government mainly to the phrase in the declaration of independence stating "that governments are instituted among men, deriving their just powers from the consent of the governed" illustrates the principle of

Where did the domestication of crops and animals begin?

In shifting to a defense policy based upon the concept of "flexible response," president kennedy was indicating that he had grave doubts about thevalue of which previous defense policy? a massive retaliationb collective securityc containmentd air power