I have thought about that often. The conclusion I have reached is this Earth's way of keeping the population of a species at a natural state - droughts, plagues etc... At first this appears harsh based on our preconceived notions of humanity. Many people will die due the environmental conditions in which they live - regardless of pollution levels.
Earth does not have a bias towards one species, such as political/economic policies will have. Mother Nature's laws determine the strongest/fittest will survive, but our current system puts wealth that leads to power as the strongest.
Switching to a system which does not value materials, money and power over others but focuses strictly living off the land such as the African Tribe will result in a drastically different social construct than we see today.
Earth does not have a bias towards one species, such as political/economic policies will have. Mother Nature's laws determine the strongest/fittest will survive, but our current system puts wealth that leads to power as the strongest.
Switching to a system which does not value materials, money and power over others but focuses strictly living off the land such as the African Tribe will result in a drastically different social construct than we see today.