A successful businessman spent the last few decades of his life doing all he could to give away his fortune. A multi-billionaire, he donated cash to a variety of causes such as bringing peace to Northern Ireland, modernizing Vietnam’s health care system, and not long before he died he spent $350 million to turn New York City’s Roosevelt Island into a technology hub. The man said, “I believe strongly in giving while living. I see little reason to delay giving. . . . Besides, it’s a lot more fun to give while you live than to give while you’re dead.”…