Book excerpt: Enhance your knowledge of business law or the legal environment with this short student guide on how law and ethics play a part in moving business and society toward (or away from) sustainability. The guide illustrates how our laws occasionally boost, but more often impose barriers to, long-term sustainable planning at both the corporate and national level. It provides supplemental materials for Constitutional law, corporate and securities law, torts and contracts, real estate law, and international law and a brief but thorough introductory chapter on sustainability, law, and ethics.