"It would be quite false to say that competition is the only relation that obtains between species. Mutual dependence is in general quite as important. Each kind exists within an ecosystem, and needs the others to keep the system going. Thus, grazing animals on the African plains co-exist because each specializes in eating some particular kind of plant, and needs the others to keep the whole pasture at a balanced level. They depend, too, on each other's specialized capacities to give warning of danger. … each also depends for survival on innumerable others, such as the insects which pollinate the plants, the fauna of their intestines and of course their predators. It is unthinkable that any species should be an island."

“Other areas were being mapped by anthropologists, who seemed to have some interest in my problem, but who were inclined to say that what human beings had in common was not in the end very important; that the key to all the mysteries did lie in culture. This seemed to me shallow. It is because our culture is changing so fast, because it does not settle on everything that we need to go into these questions.”

“If we ask how creatures that act so elaborately against their private advantage can have evolved, the answer lies in their mode of reproduction. Most workers are sterile. The unit of selection is normally the whole community. Its prosperity depends on the efficiency of the workers. An uncooperative strain would simply revert toward the solitary life these insects started from and in which many would still remain..So it is natural to understand their evolution, as we would that of a plant, without reference to the plans or wishes of the individual bees.”

“The preliminary outward movement of thought—holism—is everybit as necessary as the inward, atomizing one and in any investigation it usually needs to come first.”

“Every age has its pet contradictions. Thirty years ago we used to accept Marx and Freud together, and then wonder, like the chameleon on the turkey carpet, why life was so confusing.”

“Neither ecological nor social engineering will lead us to a conflict-free, simple path . . . Utilitarians and others who simply advise us to be happy are unhelpful, because we almost always have to make a choice either between different kinds of happiness--different things to be happy _about_--or between these and other things we want, which nothing to do with happiness.”

“The point cannot be just survival, nor even survival in numbers. Survival is just as well achieved by much less ambitions creatures which go in for sheer number. Nor is it survival-as-society, since many animals achieve this despite a lot of bickering.”