Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: thinker used the last name Oswald to publish a series of articles which earned him a place in The Free, a group within the Young Hegelians, whom he later criticized along with Bruno Bauer in another work. The partner in romances with the sisters Elizabeth and Mary Burns, he was largely influenced by Moses Hess and argued that the titular concepts are not "natural" institutions and are obstacles to human progress in The Origin of the Family, (*) Private Property, and the State. This thinker also criticized the philosophy of another German in Anti-Dring, part of which was separately published as Socialism: Utopian and Scientific. Death rates before and after the introduction of mills were discussed in his The Condition of the Working Class in England. For 10 points, name this German thinker, the collaborator of Karl Marx.
A:
Social Science