Friedrich Nietzsche | Friedrich Schiller | Friedrich Engels | Georg Solti | Carl Friedrich Gauss | Karl Friedrich Schinkel | Friedrich Dürrenmatt | Georg Philipp Telemann | Friedrich Hayek | Caspar David Friedrich | Johann Georg Wagler | Georg Wilhelm Friedrich Hegel | Friedrich Hölderlin | Friedrich Gustav Jakob Henle | Friedrich Ebert | Nicolai Ghiaurov | Georg Trakl | Georg Forster | Friedrich Wilhelm Joseph Schelling | Karl Wilhelm Friedrich Schlegel | Georg Cantor | Georg Büchner | Georg Baselitz | Friedrich Gulda | Hans-Georg Backhaus | Friedrich Rückert | Friedrich Paulus | Johann Friedrich Böttger | Georg von Holtzbrinck Publishing Group | Friedrich von Huene |
When 93 German intellectuals signed the Aufruf an die Kulturwelt manifesto in support of the war, Foerster was one of only four intellectuals to sign the Aufruf an die Europäer counter-manifesto (the others were Albert Einstein, the philosopher Otto Buek, and its author, the physiologist Georg Friedrich Nicolai).