How tech billionaires are turning on the Giving Pledge, promoted by Bill Gates and Warren Buffett; Peter Thiel says he privately told ~12 signers to undo it (Theodore Schleifer/New York Times)

How tech billionaires are turning on the Giving Pledge, promoted by Bill Gates and Warren Buffett; Peter Thiel says he privately told ~12 signers to undo it (Theodore Schleifer/New York Times) - Tech Sentiments