The importance of this topic rests with the fact that it holds crucial marks in the Mains on which selection of an aspirant may hinge. This book will prove to be your one-stop solution for clinching those marks comfortably and confidently without throwing yourself into a sea of online and offline sources.

Every chapter in the book has been prepared strictly in consonance with the UPSC syllabus in the most simple and lucid form, with a keen study of previous year exam papers. The effort has been consistently on how to make this vast and somewhat ambiguous subject easy to understand and reproduce as per the demands of questions being answered with the help of diagrams, flowcharts, infographics and easy to understand examples.

A supplement of case studies has also been added using the previous year case studies for in-depth analysis and most appropriate methods to deal with them.