A broken and disillusioned man, attacked by the German Conservatives and Nationalists as having been too liberal towards the Poles, but disliked in Poland for being too Prussian, Beseler died in 1921 in Neu-Babelsberg near Potsdam.
Som en nedbrudt og desillusioneret mand, der blev angrebet af tyske konservative og nationalister for at have været for liberal overfor polakkerne, men samtidig var ugleset blandt polakkerne for at være for preussisk, døde Beseler i 1921 i Neu-Babelsberg nær Potsdam.