Passage: Ebert agreed with Prince Maximilian that a social revolution must be prevented and that state order must be upheld at all costs. In the restructuring of the state, Ebert wanted to win over the middle-class parties that had already cooperated with the SPD in the Reichstag in 1917, as well as the old elites of the German Empire. He wanted to avoid the spectre of radicalisation of the revolution along Russian lines and he also worried that the precarious supply situation could collapse, leading to the takeover of the administration by inexperienced revolutionaries. He was certain that the SPD would be able to implement its reform plans in the future due to its parliamentary majorities.

Question: What party did Ebert want to win over?
middle-class