Answer:
The crusades created standardized methods of taxation and increased European trade.
Cognitive Approach
In contrast to behaviorists, cognitive psychologists believe that your behavior is determined by your expectations and emotions. Cognitive psychologist Jean Piaget would argue that you remember things based on what you already know. You also solve problems based on your memory of past experiences.
Slave traders viewed humans lives as dogs. Because slave traders only wanted humans to work for them and do there dirty work. They did not think anything of there value of life.
