Continental drift is created at spreading centers, and this, along with subduction, drives the system of plates in a chaotic manner, resulting in continuous orogeny and areas of isostatic imbalance. The theory of plate tectonics explains all this, including the movement of the continents, better than Wegener's theory. Hans Stille and Leopold Kober opposed the idea of continental drift and worked on a "fixist" geosyncline model with Earth contraction playing a key role in the formation of orogens. Other geologists who opposed continental drift were Bailey Willis, Charles Schuchert, Rollin Chamberlin and Walther Bucher. In 1939 an international geological conference was held
Center for the Study of Democracy (Bulgaria) Center for the Study of Democracy (Bulgaria) This article is about the Center for the Study of Democracy in Bulgaria For the other institution by the same name, in the United States, see the Center for the Study of Democracy at St. Mary's College of Maryland, USA. Founded in late 1989, the Center for the Study of Democracy (CSD) is an interdisciplinary public policy institute dedicated to the values of democracy and market economics, based in Bulgaria. The CSD is a non-partisan, independent organization fostering the reform process in Bulgaria through impact on policy and civil society, and is one