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.
Nothing in the many processes of Nature, whether she deals with men or with things, comes by chance or accident or is really at the mercy of external causes.
If goodness has causes, it is not goodness; if it has effects, a reward, it is not goodness either. So goodness is outside the chain of cause and effect.