Introductory chapter on Uexküll's Umwelt theory completed

A couple of days ago, or more precisely at 6 a.m. yesterday, I finished the book chapter "Introduction: The relevance of Uexküll's Umwelt theory today", which will serve as the introductory chapter of Carlo Brentari's book The Discovery of the Umwelt: Jakob von Uexküll between Biosemiotics and Theoretical Biology (to be published by Springer).