How did the collapse of the German monarchy change Gustav Stresemann’s political career?

The collapse of the German monarchy in 1918 was a significant blow to Gustav Stresemann, who was fundamentally a monarchist. Following the flight of Emperor William II, Stresemann’s political career underwent a major transition as he adapted to the realities of the Weimar Republic.1

After being excluded from the leadership of the left-liberal German Democratic Party, Stresemann founded the German People’s Party, a right-liberal group intended to rally supporters of the former National Liberal Party. Although he initially remained in the "national opposition" and opposed the new constitution and the Treaty of Versailles, he eventually shifted toward a policy of cooperation with the republic.1

This evolution culminated in his appointment as chancellor in August 1923, where he led a "Great Coalition" and took decisive action to stabilize the currency and address the crisis in the Ruhr, ultimately becoming a statesman of European stature.1