Quantitative work shows clearly that natural selection is a reality, and that, among other things, it selects Mendelian genes, which are known to be distributed at random through wild populations, and to follow the laws of chance in their distribution to offspring. In other words, they are an agency producing variation of the kind which Darwin postulated as the raw material on which selection acts.

An attempt to study the evolution of living organisms without reference to cytology would be as futile as an account of stellar evolution which ignored spectroscopy.

Man armed with science is like a baby with a box of matches.

There can be no truce between science and religion.

So far from being an isolated phenomenon the late war is only an example of the disruptive result that we may constantly expect from the progress of science.

An ounce of algebra is worth a ton of verbal argument.

I do not believe in the commercial possibility of induced radioactivity.