The aim of this book is to systematise knowledge about the fundamental aspects of the rescission action in Brazilian procedural law, taking into account the legislative transition between the CPC/73 and the NCPC. To this end, fundamental notions about destabilisation in Brazilian law are presented. The following themes stand out in particular as the subject of the chapters: the axiological structure of the rescission action - the values and principles responsible for shaping the rules of destabilisation -; the object of the rescission action - which stabilities can be broken by means of the rescission mechanism -; the grounds for destabilisation - which hypotheses authorise the breaking of stability -; and, finally, the time limits for destabilisation - how long a procedural stability should last.