In the turbulent years surrounding the German Revolution of 1918-19 and the birth of the Weimar Republic, a new intellectual and political landscape emerged-one in which questions of sexuality, identity, and human rights were debated with unprecedented urgency. At the center of this transformation stood Dr. Magnus Hirschfeld and the Scientific-Humanitarian Committee, whose pioneering work challenged centuries of prejudice and helped lay the foundations of modern LGBTQ+ thought.This volume captures that world in motion. It spans the aftermath of World War I, the founding of the Institute of Sexual Science in Berlin, and the release of Different Than Others-the groundbreaking 1919 film that dared to portray homosexual love with dignity. Yet even as these advances unfolded, the first shadows of Nazism began to darken the horizon, threatening the fragile freedoms of the Weimar era.Bringing together scholarship, activism, biography, and cultural history, this collection offers a vivid window into a society struggling to redefine itself. From analyses of homosexual literature during wartime, to rare historical documents on bisexuality in the 17th and 18th centuries, to reflections on figures such as Ernst Haeckel and Peter Cornelius, the volume reveals a movement both deeply rooted in the past and urgently engaged with its present.Included are contemporary medical perspectives on sexuality, critical reviews, committee communications, and reports on the rapidly developing work of the Institute of Sexual Science and the Magnus Hirschfeld Foundation. A newly added supplement provides a complete table of contents for all 23 volumes published between 1899 and 1923, making this edition an indispensable resource for historians, scholars, and readers interested in the origins of modern sexual science.This is not merely a document of its time-it is a testament to courage, inquiry, and the enduring struggle for human dignity.