The balance of life and nature on earth without human intervention is more complex/advanced than human technology currently. Without the precision of nature, we can even have food.
It is inaccurate to ever say "man vs nature" because we are, in our very existence, subject to nature. However, the idea is "man vs nature" in that it is man's ingenuity and desire against the harsh reality
Man has will and desire; and man has intelligence. Man, then, will not ever defeat nature but learn to harness and control nature. And then man will be immortal.