In the process of natural selection, then. any device that can insert a higher proportion of certain genes into subsequent generations will come to c… - Edward O. Wilson

Animals use aggression as a technique for gaining control over necessities... that are scarce or are likely to become so... They intensify their threats and attack with increasing frequency as the population around them grow. As a result the behavior itself induces members of the population to spread out in space, raises the death rate, and lowers the birth rate. In such cases aggression is said to be a "density-dependent factor" in controlling population growth.

Samuel Butler's famous aphorism that the chicken is only an egg's way of making another egg has been modernized: the organism is only DNA's way of making more DNA.

Wonderful theory, wrong species. (On Marxism, which he considered more suited to ants than to humans.)