This volume offers 11 papers that cover the wide spectrum of influences on Rudolf Carnaps seminal work, Der Logische Aufbau der Welt (The Logical Structure of the World). Along the way, it covers a host of topics related to this important philosophical work, including logic, theories of order, science, hermeneutics, and mathematics in the Aufbau, as the work is commonly termed. The book uncovers the influences of such neglected figures as Gerhards, Driesch, Ziehen, and Ostwald. It also presents new evidence on influences of well-known figures in philosophy, including Husserl, Rickert, Schlick, and Neurath. In addition, the book offers comparisons of the Aufbau with the work of contemporary scientists such as Weyl and Wiener as well as features new archival findings on the early Carnap.This book will appeal to researchers and students with an interest in the history and philosophy of science, history of analytic philosophy, the philosophy of the Vienna Circle, and the philosophy in interwar Germany and Austria.Chapter 1: External World Problems: The Logical Construction of the World and the Mathermatical Core of the External World Hypothesis; Alan Richardson.- Chapter 2: What Carnap Might Have Learned From Weyl; Thomas Ryckman.- Chapter 3: Wiener and Carnap: A Missed Opportunity? S?bastien Gandon.- Chapter 4: Neuraths Influence on Carnaps Aufbau; Thomas Uebel.- Chapter 5?: Theories of Order in Carnaps Aufbau?; Paul Ziche.- Chapter 6: Carnaps Aufbau and the Early Schlick; Matthias Neuber.- Chapter 7: Carnaps Aufbau in the Weimar Context; Thomas Mormann.- Chapter 8: G?tschenberger on the Given and Carnaps Aufbau; Elena Tatievskaya.- Chapter 9: Carnap and Phenomenology: What Happened in 1924? A. W. Carus.- Chapter 10: Rudolf Carnap and Wilhelm Ostwald; Hans Joachim Dahms.- Chapter 11: The Context of the Development of Carnaps Views on Logic up to the Aufbau; Clinton Tolley.- Chapter 12: Objectivity and Understanding: A New Reading of Carnap's Aufbau; IulianlÃq