German philosopher, sociologist, and economist who co-authored The Communist Manifesto with Karl Marx and developed the political and philosophical system known as Marxism

French chemist and microbiologist renowned for discoveries of vaccination principles, microbial fermentation, and pasteurization

French writer and dramatist best known for the romantic novel <em>La Dame aux Camélias</em> and its adaptation into Verdi's <em>La traviata</em>