The author offers a focused political and biographical account of the Electress Sophia, examining her family background in the House of Brunswick-Lüneburg, her role in securing a parliamentary claim for her descendants to the British succession, and her participation in the religious and diplomatic conflicts that shaped early modern Europe. Drawing on extensive correspondence and memoirs, the work analyzes her intellectual life, relationships with leading figures, and the Hanoverian family's policies, while supplying documentary appendices and a bibliography to illuminate disputed episodes and the dynastic context that led to the Hanoverian accession.