Answer:
there is democracy and human rights
The answer will be C. Soft Money
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Weather will be the primary reason. Despite its huge size. the real habitable area is probably less than 10% of its geographical size. Even Southern Ontario is deemed by many I know to be "too cold to live". 90% of Ontario and Quebec are simply inhabitable. I also personally think the entire Manitoba and Saskachewan are not suitable for human habitation unless we can create a way to simply hibernate during the 6 month winter (why there are so few people in Montana and North Dakota?) The fact that Montreal are thrive as a vibrant metropolis is already sort of a miracle and we don't see many such large cities with such severe weather. The only other case I can think of is probably Moscow.
they spread by the spaniards conquring many places
Adam Smith implies with his theory of the invisible hand that each person moves selfishly within the economic area, however the individual riches also benefits the rest of the population.
I think the theory speaks of the trust that people deposit in moving within their own businesses, which is a good thing.