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Because America has more wilderness and fewer people than other places, it was "natural" that it would become key to the nation's identity.Declaring the National Parks "America's best idea" highlights the emphasis on the physical environment as being core to a national identity, which is subsequently the core idea behind "nature's nation."Dating back at least to the Colonial era, leaders used the physical environment to demonstrate the value and eventually the identity of the New World.America is the only country that has relied on or used images or symbols from the physical environment as core to a sense of identity and hence is the only country that has established "national parks."

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