Mainly to put this into simplier terms is that earth possess many cultures as you all stated within one form of intelligent life and that is us Human beings.
The definition of Intelligent life is any lifeform having the capacity for thought and reason especially to a high degree; Mainly any life that is like us is defined as intelligent life. So in other words we havent found anything beyond our world that is like us if we do we will label them intelligent wether they are primative or not.
A type of life that is able to build technology, great cities, creating a society. A type of life that has written and recorded its history is labeled as intelligent life.
Wild life is not intelligent because they don't possess our ability to record language or the ability to build great industrial societies, and native societies and technology and so forth and so on.
Wildlife does communicate but more on a survival and instinct type of scale and level but they are not as defined above intelligent like us.
Oddworld mirrors the cultures that all man kind possess through the many different intelligent life forms from native to Industrial and perhaps eventually a new type possably a common type like what a Khanzumer might be.
And also they live all on the same world which makes Oddworld a multi intelligent life world. Our world is a single intelligent life world. Thats the difference.
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