  Rickert was a very prolific writer. He managed his publications in a way that should strike the contemporary reader as familiar. He would present new ideas and lines of inquiry first in exploratory journal articles (many of them published in Logos, the journal he founded in Freiburg) and subsequently he would incorporate them in larger publications, often including previously published materials. Following a common trend in his time, he kept working at his two major books, The Object of Knowledge (first published in 1892) and The Limits of Concept-Formation in Natural Science (first published in 1902), for his entire life. Instead of writing new books he would rewrite entire chapters and add new sections to his two magna opera, thereby addressing criticism and sometimes even changing significantly his previous views. So, for instance, The Object of Knowledge grew from the 91 pages of the first edition to the 460 pages of the sixth edition in 1928. This style of writing makes the development of his thought particularly perspicuous. However, in spite of his constant revisions and additions, the fundamental principles of Rickert’s philosophy remained constant throughout his career. In keeping with his systematic understanding of philosophy (see below), his approach to new problems was geared towards connecting them to old problems, and his way of handling criticism was often characterized by an effort to reformulate his opponent’s views so as to make them compatible with his own.