Because a monopoly would end up making someone monopolizing the whole world to a point where no one can buy a business and would allow them to set their prices as high as they want.
Well one way they where effected was with the geography and lay of the land many villages could not interact with each other easily. This caused trouble for villages cause their was some places with material that others could not get to without trade.
The answer is <span>he presence of Communist governments in the Western Hemisphere</span>
