The science of systematics has long been affected by profound philosophical preconceptions, which have been all the more influential for being usuall….

If a sect does officially insist that its structure of belief demands that evolution be false, then no compromise is possible. An honest and competen….

The fact -- not theory -- that evolution has occurred and the Darwinian theory as to how it occurred have become so confused in popular opinion that ….

Species evolve exactly as if they were adapting as best they could to a changing world, and not at all as if they were moving toward a set goal..

...the argument from absence of transitional types boils down to the striking fact that such types are always lacking unless they have been found..

A rill in a barnyard and the Grand Canyon represent, in the main, stages of valley erosion that began some millions of years apart..

Almost all paleontologists recognize that the discovery of a complete transition is in any case unlikely..

The earliest and most primitive known members of every order already have the basic ordinal characters, and in no case is an approximately continuous….

Most of the dogmatic religions have exhibited a perverse talent for taking the wrong side on the most important concepts in the material universe, fr….

The opposition to teaching evolution is, of course, almost always given a religious reason. That may usually be its real basis, but I think it is oft….

Certainly paleontologists have found samples of an extremely small fraction, only, of the earth's extinct species, and even for groups that are most ….

Man has risen, not fallen. He can choose to develop his capacities as the highest animal and to try to rise still farther, or he can choose otherwise….

It is obvious that the great majority of humans throughout history have had grossly, even ridiculously, unrealistic concepts of the world. Man is, am….

It remains true, as every paleontologist knows, that most new species, genera, and families, and that nearly all categories above the level of famili….

To put it crudely but graphically, the monkey who did not have a realistic perception of the tree branch he jumped for was soon a dead monkey-and the….

I don't know where to put whales. I'm sticking them here, but I don't have any reason for it..

Man stands alone in the universe, a unique product of a long, unconscious, impersonal, material process with unique understanding and potentialities.….

Recognition of this kinship with the rest of the universe is necessary for understanding him, but his essential nature is defined by qualities found ….

Man is the result of a purposeless and materialistic process that did not have him in mind. He was not planned. He is a state of matter, a form of li….

Human judgment is notoriously fallible and perhaps seldom more so than in facile decisions that a character has no adaptive significance because we d….

The meaning that we are seeking in evolution is its meaning to us, to man. The ethics of evolution must be human ethics. It is one of the many unique….