Years after the great reunion, I watched my granddaughter Hope, now eighteen, address the International Conference on Gifted Children in Geneva.

"My generation doesn't see psychic abilities as supernatural," she said to the packed auditorium. "We see them as tools. Like any other human capacity, they can be used for good or harm. The choice is always ours."

Behind her, slides showed statistics that would have seemed impossible when I was her age. Forty-seven countries now had official ...