This book investigates the principles of parametric syntax, exploring how variations in grammatical structures across Semitic and Romance languages can be explained by a limited set of underlying parameters. Hagit Borer, a noted linguist, draws upon extensive comparative analysis of these language families to present a unified framework for understanding syntactic variation. The work examines core syntactic phenomena, proposing that differences in surface structures arise from distinct settings of abstract grammatical parameters.

This work is recognized as a significant contribution to theoretical linguistics, particularly within the framework of generative grammar. It is often cited for its detailed comparative analysis of Semitic and Romance languages and its rigorous application of parametric syntax principles. The book is considered a valuable resource for scholars and advanced students interested in language universals and variation.