The natives were introduced to goods from the old world but mostly to diseases. The Europeans didn't even know that the germs that they carried on them were deadly for locals because the locals didn't develop an immunity against them so this caused many diseases in the new world.
Answer:
Economic abundance, cold war, civil rights and rock and Roll.
Explanation:
The British and France went to war the Indians helped out.
The only option that is not generally a reason why historians study societal change would be "<span>d. to estimate how long it would take to build a road system," since this requires a separate type of research. </span>
Answer:
John J. Pershing
Explanation:
Is well remembered for commanding the American Expeditionary Force (AEF) in Europe on the Western Front during the First World War.