POCANTICO HILLS, N. Y.—Some might say David Rockefeller, a scion of America’s greatest fortune and the veteran chief executive of Chase Manhattan Bank, was a dedicated networker long before the age of Facebook.
That would grossly understate his horizons. Mr. Rockefeller recorded contact information along with every meeting he had with about 100,000 people world-wide on white 3-by-5-inch index cards. He amassed about 200,000 of the cards, which filled a custom-built Rolodex machine. He kept the 5-foot high electronic device...