"In chess or in football, the tactic that proves most effective is soon the one that people learn easily to block. Every innovation in attack is soon countered by another in defence."

“As every bird-watcher knows, the beauty of a bird's song is inversely correlated with the colourfulness of its plumage.”

“...compare mankind with other animals that share our highly social habits: with colonial birds, monkeys and dolphins. As we shall see, the lesson they teach is that we are designed for a system of monogamy plagued by adultery.”

“Life is a Sisyphean race, run ever faster towards a finishing line that is merely the start of the next race.”

“People are attracted to people of high reproductive and genetic potential -the healthy, the fit and the powerful. The consequences of this fact, which goes under the name of sexual selection, are bizarre in the extreme.”

“Evolving is not a goal but a means to solving a problem.”

“In behavior, as in appearance, every human individual is unique.”