German politician who served as the first president of Germany from 1919 until his death in 1925, establishing democratic governance in a new republic

Swedish Prime Minister who led the Social Democratic Party, advocated for universal suffrage and workers' rights, and won the Nobel Peace Prize in 1921

Swedish Prime Minister who led the Social Democratic Party, advocated for universal suffrage and workers' rights, and won the Nobel Peace Prize in 1921

Austrian philosopher, esotericist, and social reformer who founded anthroposophy and contributed as a writer, teacher, and architect

French astronomer, prolific author of popular science and early science fiction, and founder of L'Astronomie magazine

German philosopher, logician, and mathematician known as the father of analytic philosophy and a profound philosopher of mathematics