There are niches enough for all : the large, medium and the small.
There is no evidence in the Earth's current environment that contradicts the idea that there won't always be room for some big and medium creatures, above the size of the ever-present microbes.
But the scientific assumption that the trend of evolutionary Progress is moving in a direction that indicated that only Big beings - ie humans and their herds - will dominate the Earth is hardly borne out by long term evidence.
There is no evidence in the Earth's current environment that contradicts the idea that there won't always be room for some big and medium creatures, above the size of the ever-present microbes.
But the scientific assumption that the trend of evolutionary Progress is moving in a direction that indicated that only Big beings - ie humans and their herds - will dominate the Earth is hardly borne out by long term evidence.
