Each generation is a filter, a sieve; good genes tend to fall through the sieve into the next generation; bad genes tend to end up in bodies that die young or without reproducing.

The world becomes full of organisms that have what it takes to become ancestors. That, in a sentence, is Darwinism.

... you need more than luck to navigate successfully through a thousand sieves in succession.

If you have a faith, it is statistically overwhelmingly likely that it is the same faith as your parents and grandparents had. No doubt soaring cathedrals, sti…

The genes are the master programmers, and they are programming for their lives.

One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.

If an organised body is not in the situation and circumstances best adapted to its sustenance and propagation, then, in conceiving an indefinite variety among …