In all things which have a plurality of parts, and which are not a total aggregate but a whole of some sort distinct from the parts, there is some cause.
For, truly speaking, whoever provokes me to a good act or thought has given me a pledge of his fidelity to virtue,--he has come under the bonds to adhere to that cause to which we are jointly attached.
Thus the recent rapid evolution of human intelligence is not only the cause of but also the only conceivable solution to the many serious problems that beset us.