The fertility paradox states that with increasing level of evolution the number of offspring decreases. The classical evolutionary theory claims the survival of the fittest and the fittest be defined the one that generates the most offspring. How on the contrary the number of offspring systematically reduces with the progress of evolution is illustrated by this blog entry. Those data rather suggest that birth control is the goal of evolution. That even applies to social fauceirs and is the reason behind the Malthus paradox.
As can be learned from the paradox evolutionary progress can only be understood if increasing fauceir complexity is taken into account instead of simple mathematical statistics that only apply to a certain level of evolution and that intentionally neglect progress mathematical feasibility.