At her 70th birthday party, my mentor, a nutritionist who went back to Africa to work with the poor, tells me that she is retiring to write a book on how African children adapt when they leave the country and are confronted with a world of private property. Her nephew, who has been trying to start a string of business ventures in Senegal—starting with a chicken coop, growing now to car import-export, in order to leverage some real estate speculation—makes the obvious point that children in Africa do learn that some objects are off-limits. But her adopted son, who was once an orphan in Africa and is now an investment banker and venture capitalist, disagrees. He says that his own two-year-old son has no idea what private property is, because he doesn't have to share. The baby takes it all in.