Otto von Bismarck was a German statesman who played a crucial role in the unification of Germany in the 19th century. Born on April 1, 1815, he served as the Prime Minister of the Kingdom of Prussia and later became the first Chancellor of the German Empire. Bismarck is known for his diplomatic skills and the use of realpolitik, a pragmatic approach to politics that prioritized practical outcomes over ideological considerations. Bismarck's policies included a series of wars that ultimately led to the unification of various German states under Prussian leadership. He also implemented social reforms, such as health insurance and pensions, to gain support from the working class. His legacy includes the establishment of a powerful German state and the complex political landscape of Europe during the late 19th century.