While on Baffin Island he began to develop his interest in studying non-Western cultures (resulting in his book, The Central Eskimo, published in 1888). In 1885, Boas went to work with physical anthropologist Rudolf Virchow and ethnologist Adolf Bastian at the Royal Ethnological Museum in Berlin. Boas had studied anatomy with Virchow two years earlier, while preparing for the Baffin Island expedition. At the time, Virchow was involved in a vociferous debate over evolution with his former student, Ernst Haeckel. Haeckel had abandoned his medical practice to study comparative anatomy after reading Charles Darwin's The Origin of Species, and vigorously promoted Darwin's ideas in Germany. However, like most other natural scientists prior to the rediscovery of Mendelian genetics in 1900 and the development of the modern synthesis, Virchow felt that Darwin's theories were weak because they lacked a theory of cellular mutability. Accordingly, Virchow favored Lamarckian models of evolution. This debate resonated with debates among geographers. Lamarckians believed that environmental forces could precipitate rapid and enduring changes in organisms that had no inherited source; thus, Lamarckians and environmental determinists often found themselves on the same side of debates