Of course we need children! Adults need children in their lives to listen to and care for, to keep their imagination fresh and their hearts young and to make the future a reality for which they are willing to work.

EARTH DAY uses one of humanity's great discoveries, the discovery of anniversaries by which, throughout time, human beings have kept their sorrows and their joys, their victories, their revelations and their obligations alive, for re-celebration and re-dedication another year, another decade, another century, another eon.

One of the most dangerous things that can happen to a child is to kill or torture an animal and get away with it.

Grandparents are given a second chance to enjoy parenthood with fewer of its tribulations and anxieties.

Our treatment of both older people and children reflects the value we place on independence and autonomy. We do our best to make our children independent from birth. We leave them all alone in rooms with the lights out and tell them, 'Go to sleep by yourselves.' And the old people we respect most are the ones who will fight for their independence, who would sooner starve to death than ask for help.

We — mankind — stand at the center of an evolutionary crisis, with a new evolutionary device — our consciousness of the crisis — as our unique contribution.

Warfare ... is just an invention, older and more widespread than the jury system, but none the less an invention.