History’s biggest oil boom is happening right now, in the United States, ushering in the third age of oil and gas law. The first age of oil and gas law also began in the United States a century ago when landowners and oil companies developed the oil and gas lease. The lease made the modern oil and gas industry possible and soon spread as the model for development around the world. In the second age of oil and gas law, landowners and nations across the globe developed new legal agreements that improved upon the lease and won these resource owners a larger share of the benefits of oil and gas production. The third age of oil and gas law, which is now beginning, will be defined by three forces. First, fracking is transforming the common law do...