the members should be trained, it purchased a farm at Bommersvik in order to form a union school. During this period, SSU had over 100,000 members. 1940s By the 1940s, SSU became a national, fully functioning organization, and became closer to its parent organization. SSU criticized fascism during the 1940s, helped refugees and had lectures about fascist crimes. Willy Brandt lectured on the subject of Bommersvik. 1950s The big question for SSU during the 1950s was whether Sweden should have nuclear weapons. Bertil Löfberg argued in favour of atomic weapons, and was opposed by Oskar Lindkvist. The party made efforts to reform itself during this period, and tried to build a folkhemmet, a concept similar to that of the Welfare State. SSU began to campaign on ways to solve the housing crisis, and ideas about housing policies that led to 'one million program' began to emerge. 1960s The presidents Ingvar Carlsson (1961–1967) and Bosse Ringholm (1967–1972) characterized this period as a time of success for Sweden, and social reforms could proceed rapidly. During this time, international issues became important, because SSU saw great injustice, especially abroad. It criticized foreign dictatorships and wars, including the Vietnam War. SSU felt obliged to fight for democratic socialism. Ringholm said about this time: "An important task for SSU was to keep clean to the left and ensure that SSU is not ground into sects to the left of social democracy". The Federal Board did not agree on how to respond to the Vietnam War. Everyone wanted to criticize the U.S., but Ingvar Carlsson and Ringholm wanted at the same time not be associated with the Communists in North Vietnam. Olof Palme believed that there was no risk that SSU would be misunderstood. The Board decided not to give any directives, but left it to each member / municipality / district to himself to decide whether it wanted to demonstrate against the Communists. 1970s After the left wing lost several congresses in 1972, they started organizing themselves as the Thursday Club. Thursday Club's name came from the 40 left-wing delegates who met on a Thursday in Congress in 1972 and decided to maintain contact, including through political seminars, until the next congress. After a while, this group dispersed and a small group began to gather behind the newspaper offensive, which started in 1973. In 1976, it was revealed that secret Trotskyite activities had occurred within