There are many examples of countries that have converged with developed countries which validate the catch-up theory. Based on case studies on Japan, Mexico and other countries, Nakaoka studied social capabilities for industrialization and clarified features of human and social attitudes in the catching-up process of Japan in the Meiji period (1868-1912). In the 1960s and 1970s the East Asian Tigers rapidly converged with developed economies. These include Singapore, Hong Kong, South Korea and Taiwan - all of which are today considered developed economies. In the post-war period (1945–1960) examples include West Germany, France and Japan, which were able to quickly regain their prewar status by replacing capital that was lost during World War II.