Oskar Kraus was born in Prague on 24 July 1872. After attending the German State School (Staatsgymnasium) Kraus began studying the philosophy of law at Prague in 1890. His philosophical teachers were Anton Marty and Friedrich Jodl. It was through Marty that Kraus first fell under the significant intellectual influence of Franz Brentano whom he met for the first time in 1893. Graduating from Prague in 1895 Kraus sought a career at the Finanzprokuratur in 1896. In 1902 he earned completed his habilitationsschrift on The Theory of Value: A Benthem Study.