They played a role against the violation of human rights because of the inequality the world had against race,color,ethnicity and even weight/height. When people protested about this topic, people were less hateful to diversity and would allow any other skin color, weight or races into this world.
The answer is: He wanted to amass as much land as possible for France.
At that time, Napoleon believe that Acquiring as much land as possible is the key to ensure the French empire's wealth for the following generation.
He see that lands contain a large number of opportunities because lands often contain various type of resources that can be used as materials for products to be sold to other country.