For early man, little of the natural world was valuable. The few natural things that were useful were abundant, and therefore undemanding. Now, thanks to technology, far more of the natural world is useful, but it must satisfy the demands of over six billion people. Abundance has been superseded by scarcity, not because the natural world has diminished but because we now know how to exploit it. The result, in the absence of effective rules, and in its various manifestations, is plunder. Some of the things we might think of as natural are already adequately protected. The fish in a fish farm, the trees planted in a private forest: these are managed within a framework of incentives that is compatible with social interests. But there are two major holes in the protective web, and too much is falling through them. One hole is created by bad governance, and the other by the limitations of good governance. In other words, one is created locally, by specific governments in the countries of the bottom billion and their management of natural assets, and the other is global and involves management of those assets beyond national boundaries. The nonrenewable natural assets in the territories of the bottom billion are seldom harnessed for the development of their societies. As a result, future generations may inherit a depleted natural world with little to show for it. The once-only chance of using assets to lift these societies out of poverty through harnessing them will have been missed. The governments of many of the poorest countries are insufficiently held to account by their citizens for the good management of the natural assets under their control. The international renewable natural assets, such as the fish of the high seas, are liable to be plundered to extinction, while the natural liabilities, such as carbon, are liable to accumulate. The fish will have been eaten, and the carbon emitted, predominantly by the citizens of the rich countries. Throughout this book I have been guided by the haunting question of what future generations will think of us.