To require a citizen to sign a loyalty oath is to destroy some of the loyalty he could otherwise claim, since any subsequent loyal behavior may then be attributed to the oath.

The human species took a crucial step forward when its vocal musculature came under operant control in the production of speech sounds. Indeed, it is possible that all the distinctive achievements of the species can be traced to that one genetic change.

The only geniuses produced by the chaos of society are those who do something about it. Chaos breeds geniuses. It offers a man something to be a genius about.

I will be dead in a few months. But it hasn't given me the slightest anxiety or worry. I always knew I was going to die.

Many social practices essential to the welfare of the species involve the control of one person by another, and no one can suppress them who has any concern for human achievements

Was putting a man on the moon actually easier than improving education in our public schools?

The evolution of cultures appears to follow the pattern of the evolution of species. The many different forms of culture which arise correspond to the "mutations" of genetic theory. Some forms prove to be effective under prevailing circumstances and others not, and the perpetuation of the culture is determined accordingly.