Editor's Introduction

James Duffy

There are four parts to this introduction: (i) an overview of the problem that concerned Lonergan for more than thirty years; (ii) a summary of some attempts to implement the “doubling” idea  in the last 50 years; (iii) some comments on the three-step procedure (or three “objectifications”) carried out in this volume; (iv) a few suggestions regarding “What next?” possibilities.