When Tiffany Shlain thinks of her favorite quote from naturalist John Muir, she thinks of the internet: “When you tug at a single thing in the universe, you find it’s attached to everything else.” As a filmmaker and founder of the Webby Awards — the “Oscars of the internet” — she is committed to reframing technology as an expression of the best of what humanity is capable, with all the complexity that entails. With her young family, she has helped popularize the practice of the “tech shabbat” — 24 unplugged hours each week. Her perspective on our technology-enhanced lives is ultimately a purposeful and enriching one: the internet is our global brain, towards which we can apply all the wisdom we are gaining about the brains in our heads and the character in our lives.

The coming stage of evolution, Teilhard de Chardin said, won’t be driven by physical adaptation but by human consciousness, creativity, and spirit. We visit with his biographer Ursula King, and we experience his ideas energizing New York Times Dot Earth blogger Andrew Revkin and evolutionary biologist David Sloan Wilson.

Each of us, in our everyday interactions, chooses between letting technology shape us and shaping it towards human purposes, even towards honoring what we hold dear. Sherry Turkle, director of the MIT Initiative on Technology and Self, is full of usable ideas — from how to declare email bankruptcy to teaching our children the rewards of solitude.