The law of succession rests on a single brute fact: you can't take it with you. The stock of wealth that turns over as people die is staggeringly large. In the United States alone, some $41 trillion will pass from the dead to the living in the first half of the 21st century. But the social impact of inheritance is more than a matter of money; it is also a matter of what money buys and brings about. Law and custom allow people many ways to...