Life in the twentieth century is like a parachute jump: you have to get it right the first time. - Margaret Mead

[Among the Arapeh... both father and mother are held responsible for child care by the entire community...] If one comments upon a middle-aged man as good-looking, the people answer: 'Good-looking? Ye-e-e-s? But you should have seen him before he bore all those children'.

If the future is to remain open and free, we need people who can tolerate the unknown, who will not need the support of completely worked out systems or traditional blueprints from the past.

"The notion that we are products of our environment is our greatest sin; we are products of our choices."
Margaret Mead
(this may not be her exact wording, but it's close enough).