Rightly did Darwin pin up a paper warning himself to be careful about using such words as "higher" and "lower." What is downward about the trend that… - Mary Midgley

If we ask how creatures [bees] 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 symbolism of meat-eating is never neutral. To himself, the meat-eater seems to be eating life. To the vegetarian, he seems to be eating death. There is a kind of gestalt-shift between the two positions which makes it hard to change, and hard to raise questions on the matter at all without becoming embattled.

We must face unconsidered possibilities and ask ourselves alarming questions–for instance, must we perhaps let the self-destroyer go if he really wants to? Trying to answer this by collecting information about our own neurones would be no more use than doing it, like the Roman augur, by inspecting the entrails of a goat.