Farewell Address by Washington--this address urged the nation to avoid alliances and getting involved in affairs not our own. This set the tone for isolationism.
Monroe Doctrine--this foreign policy stated the US would protect the Western Hemisphere from European involvement and implied the US would stay out of European affairs.
The Treaty of Versailles and League of Nations would involve the US in world affairs and bring European issues to the doorstep of the US.
Answer:
New transportation systems such as rail, road sea and air were introduced. New languages, religions and a new way of life were introduced. The imperialists countries gained cheap, efficient workforce. Food production increased due to better farming methods. (part -a)
Imperialism impacted societies in countless negative ways. It led to slave trade which then led to social discrimination around the world. It also damaged the cultures and created disunity among the natives. Last but not least, imperialism stripped countries off their natural resources and left nothing for the natives.(part-b)