You're falling into the same trap there that GP was pointing out. Yes, any number of humans (starting at 1) will alter the state of their surroundings. But that doesn't make the surroundings "unnatural" in any way. It just happens that modern human societies tend to alter their environment in a way that it loses many of the properties that we long for, yet somehow we don't seem capable of changing the way we shape our environments in a different way. Instead we declare "that over there" to be "nature" which is to de desired and "this here" to be "the civilized world" and most people literally can't imagine any correspondence of the two.