With the advent of Nazi Germany and the invigoration of European fascism, Ralea was again moving to the left, cooperating with the Social Democratic Party (PSDR). In 1936, at "Dreptatea", he condemned the German march into Rhineland as a bad omen and an attack on world peace. He became one of the PNȚ men affiliated with Lord Cecil's International Peace Campaign, which, in Romania, was dominated by PSDR militants. He also had rapports with the outlawed Romanian Communist Party (PCdR): with Dem I. Dobrescu, he formed a committee to defend jailed communists such as Alexandru Drăghici and Teodor Bugnariu.