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
The Defence of Duffer's Drift The Defence of Duffer's Drift The Defence of Duffer's Drift is a short 1904 book by Major General Sir Ernest Dunlop Swinton. It purports to be a series of six dreams by "Lieutenant Backsight Forethought" about the defence of a river crossing in the Boer War. The infantry tactics in the early dreams are disastrous, but each time BF learns something until in the final defence he is successful. "The Defence of Duffer's Drift" was published in 1904 when Swinton was a Captain. It appeared in the British United Service Magazine under the pseudonym, Lieutenant N. Backsight Forethought ("BF"), who