DAVID W.BLIGHT is the director of Yale University's Gilder Lehrman Center for the Study of Slavery, Resistance, and Abolition and a professor of American history. 大卫布莱特是位美国历史学教授,同时也是耶鲁大学莱尔曼研究中心的主任。
Futurist George Gilder describes world where the economy is based on sand, glass and air. 未来学家乔治格力德描述世界经济是依靠沙子,玻璃和空气。