...it is only in the last hundred years or so that our technology has advanced to the point where we can really fundamentally disrupt the balance created here by four and a half billion years of evolution...
This statement is so wrong I don't even know where to start.
For hundreds (if not thousands) of years humans have dramatically altered their natural environment by cultivating land, hunting various animals to extinction and selective breeding. However, evolution never achieved a "balance" for humans to disrupt. Evolution and "balance" are almost diametrically opposite. Are you under the impression that after 4 billion years of evolution, we finally reached a stable terminal point, only to be disrupted by naughty humans?
This statement is so wrong I don't even know where to start.
For hundreds (if not thousands) of years humans have dramatically altered their natural environment by cultivating land, hunting various animals to extinction and selective breeding. However, evolution never achieved a "balance" for humans to disrupt. Evolution and "balance" are almost diametrically opposite. Are you under the impression that after 4 billion years of evolution, we finally reached a stable terminal point, only to be disrupted by naughty humans?