This article begins from a simple observation: Chapter 11 of the United States Bankruptcy Code is the global standard for corporate restructuring, but at the same time it is a far more complex procedure than most jurisdictions seem to require. This observation begs the question what parts of a bankruptcy system are ‘essential’. We argue that two elements are essential because they cannot be achieved by contracting alone: asset stabilisation and asset separation. Stabilisation ensures that the firm’s options are maintained. Asset separation ensures that the assets underlying these options can be separated from liabilities that are attached to them by law or contract. Both these elements drive much of the rules that are necessary to resolve d...