Joel Garreau is a student of culture, values, and change. Joel's latest book, Radical Evolution: The Promise and Peril of Enhancing Our Minds, Our Bodies, and What It Means to Be Human, takes an unprecedented, sometimes alarming, always spellbinding look at the hinge in history at which we have arrived. For hundreds of millennia, our technologies have been aimed outward at altering our environment in the fashion of fire, agriculture, or space travel. Now, for the first time, we are increasingly aiming inward at modifying our minds, memories, metabolisms, personalities, progeny and possibly our immortal souls. Radical Evolution is about altering human nature -- not in some distant tomorrow, but right now, on our watch.