They viewed the native americans as savages because they did things differently so when they saw that the native americans weren't following the same things as them they decided that they were savage.
Answer:
Climate change, Availability of resources
Explanation:
1. Soon enough when the climate on the planet started to become more arid and become too hot, so humans started to migrate from Africa.
2. People started to move away to the places where resources were available.
A new concept that became popular with department stores was using credit cards, and buying on credit: it allowed the users t posses good they cannot afford and on the other hand gave more revenue to the shops and they could charge interest.
Answer: Im pretty sure its replace manual laborers and manufacture cars, run spaceships, make toys.
Explanation: If artificial intelligence becomes smart enough they can replace workers.