This Comment will ... first briefly explore the historical development of the concept of voidness. Second, it will detail the rise of the formalist approach, and will provide some criticism of that approach. Third, it will introduce the legal underpinnings of the functionalist approach. Finally, it will attempt to pull back the layer of legal detritus that has developed on this topic to reveal a workable and practical approach to understanding contract invalidity.
Jesse A. Schaefer, Beyond a Definition: Understanding the Nature of Void and Voidable Contracts, 33 Campbell L. Rev. 193 (2010).