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During World War II , artworks and monuments were subject to everything from accidental destruction to opportunistic pilfering and systematic theft by the Nazi hierarchy . The other new actors - - Singapore , South Korea , Taiwan , and Hong Kong - - played no separate role at all as export economies before World War II , but today their combined global share is more than 10 percent . For decades post-World War II , Australia willingly accepted immigrants & refugees , but as large movements of refugees continued , it and many other western governments increasingly interpreted the UN Refugee Convention ( 1951 ) more strictly . The publication files for all the Imago authors give considerable insight to the problems faced by the specialist publisher in Britain during and just after World War II , as paper and other material shortages and inflation severely tried the patience and cost-calculating skills of publisher and printer alike .