of the war, Switzerland interned 300,000 refugees. 104,000 of these were foreign troops interned according to the Rights and Duties of Neutral Powers outlined in the Hague Conventions. The rest were foreign civilians and were either interned or granted tolerance or residence permits by the cantonal authorities. Refugees were not allowed to hold jobs. 60,000 of the refugees were civilians escaping persecution by the Nazis. Of these, 26,000 to 27,000 were Jews. Between 10,000 and 25,000 civilian refugees were refused entry. At the beginning of the war, Switzerland had a Jewish population of between 18,000 and 28,000 and a total population of about 4 million. Within Switzerland at the time of the conflict, there was moderate polarization. Some were pacifists. Some took sides according to international capitalism or international communism. Others leaned more towards their language group, with some in French-speaking areas more pro-Allied, and some in Swiss-German areas more pro-Axis. The government attempted to thwart the activities of any individual, party, or faction in Switzerland that acted with extremism or attempted to break the unity of the nation. The Swiss-German speaking areas moved linguistically further away from the standard (high) German spoken in Germany, with more emphasis on local Swiss dialects. In the 1960s, significant controversy arose among historians regarding the nation's relations with Nazi Germany. By the 1990s the controversies included a class-action lawsuit brought in New York over Jewish assets in Holocaust-era bank accounts. The government commissioned an authoritative study of Switzerland's interaction with the Nazi regime. The final report by this independent panel of international scholars, known as the Bergier Commission, was issued in 2002. History after 1945 During the Cold War, Swiss authorities considered the construction of a Swiss nuclear bomb. Leading nuclear physicists at the Federal Institute of Technology Zurich such as Paul Scherrer made this a realistic possibility. However, financial problems with the defense budget prevented substantial funds from being allocated, and the Nuclear Non-Proliferation Treaty of 1968 was seen as a valid alternative. All remaining plans for building nuclear weapons were dropped by 1988. From 1959, the Federal Council, elected by the parliament, is composed of members of the four major parties, the Protestant Free Democrats, the Catholic Christian Democrats, the left-wing Social Democrats, and the right-wing People's Party, essentially creating a system without a sizeable parliamentary opposition (see concordance system), reflecting the powerful position of an opposition in a direct democracy.