He attacked the French utopian socialist Charles Fourier in Socialism: Utopian and Scientific, and h
He attacked the French utopian socialist Charles Fourier in Socialism: Utopian and Scientific, and he spoke out against the institution of marriage in The Origin of the Family, Private Property, and the State. This co-author of The Holy Family  and critic of Eugene Duhring wrote The Condition of the Working Class in England in 1844 after seeing the horrors of the textile industry.  For 10 points, identify this collaborator with Karl Marx on a work that mentions "economic  original sin", The Communist Manifesto.
He attacked the French utopian socialist Charles Fourier in Socialism: Utopian and Scientific, and he spoke out against the institution of marriage in The Origin of the Family, Private Property, and the State.
Friedrich Engels