Willy Brandt formed his first government in 1969. The head of his Chancellery, Horst Ehmke, and the head of its planning staff, Reimut Jochimsen, wanted a Rationalisierung der Politik, a rationalization of politics, built on modern data processing. The civil service increasingly rejected the planners, and part of the public mocked them. The historian Andreas Rödder describes the new Chancellery building, commissioned by Ehmke in 1970, as a product of the era’s technocratic belief that the future could be planned and shaped. Around 1973 that belief collapsed. Contemporaries called the shift the Tendenzwende, the change of trend.